1 Trunking 101 Radio Technology Presentation July 13, 2007 Rey Freeman, GeoComm
Transcript
1
Trunking 101Radio Technology Presentation
July 13 2007
Rey Freeman GeoComm
2
Presentation Agenda
Trunking Radio Systems ldquo101rdquobull Trunked radio vs conventional radio systems
Simulcast transmitting technology Voting receiver system technology Digital vs analog modulation technology
3
ldquoTrunking 101rdquo
CentralController
4
What is ldquoTrunkingrdquo
It is NOT a term that ldquobelongsrdquo to Motorola MaCom or any other manufacturer
It is NOT a term exclusively for radio systems It IS a generic term used to describe
ldquoThe sharing of a limited number of communications paths (or Trunks) among Many Usersrdquo
5
Conventional vs Trunked
Conventional Radio (repeater) systembull Uses a dedicated radio frequency for each
radio channel in a system (unless sharing a channel)
bull A Channel = a Frequency (Ie 154235 Mhz is County Fire)
bull Each frequency is assigned to a group of users
6
TXRX
FD
Fire Channel154235 MhzTX
RX
EMS Channel155340
TXRX
Law Repeater Channel 155625 Mhz
EMS
PD
7
TXRX
FD
Fire Channel154235 Mhz
TXRX
EMS Channel155340
TXRX
Law Repeater Channel 155625 Mhz
EMS
PD1PD2
X
8
Your Bank Tellers ndash as ldquoConventionalrdquo
PD FireEMS PWAdmin
EMS FD
FDPD
PD
Queueby
Account
9
Conventional vs Trunked
Conventional Radio (base or repeater) systembull A Channel = a Frequencybull If a channel is in use radio user must wait in
ldquoqueuerdquo before being able to transmit on the system
bull hellipand a new frequency must be obtained each time another ldquochannelrdquo is needed in the radio system
bull The system is limited by the number of frequencies in the systemhellip
10
Trunked Radio Systems
CentralController
11
Conventional vs Trunked
Trunked Radio (repeater) systembull Uses a group of similar radio frequencies to
create a ldquopoolrdquo for radio system users to accessbull Systems can be built using VHF UHF or 800
Mhzbull A Channel is NOT a Frequencyhellip(generally)bull A Channel (on your radio) is now a computer-
generated codebull hellipand are now referred to as ldquoTalk Groupsrdquo
12
Conventional vs Trunked
Trunked Radio (repeater) systembull The entire system is managed by a computer
often referred to as the ldquoCentral Controllerrdquobull All radios in the system also are computer-
controlled and communicate to the central controller via one frequency known as the ldquoControl Channelrdquo
13
EMS
1 to 28 Channels
CH 1
CentralController
TX RX
CH 2
RXTX
CH 3
RXTX
CH 4
RXTX
CH 28
RXTX
ControlChannel
PD
Basic Trunking Diagram
FD
14
Your Bank Tellers ndash as ldquoTrunkedrdquo
Director CH 5CH 3 CH 4CH 2
EMS FD
PD
PD
Queueby
FirstAvailable
Teller
FD
IN
15
Conventional vs Trunked
Trunked Radio Benefits bull Greatly improved usage of scarce radio
frequenciesbull Greater overall radio system flexibility
includingChannel (Talk Group) capabilitiesVarious user features including Emergency
Alarm PTT ID Channel Regrouping Call Alert and Radio Inhibit
bull Brings radio users together on a common radio system
bull Consistency in radio coverage
16
So How Does It Work
17
Control Channel continuously transmits system data to all radios PD
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FDEMS
18
Radio user presses TX button and radio information is sent via control channel to
Central Controller
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
19
Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios
selected on same Talk Group
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
FD
20
Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the
voice transmission
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
FD
21
When transmission is completed all units revert back to Control Channel
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
FD
22
Radio System Fleetmapping
Radio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo
(Law Enforcement shown here)
1 Itasca Co Law 1 IT Law 1 Y Y 1 22 Itasca Co Law 2 IT Law 2 Y Y 2 23 Itasca Co Law 3 IT Law 3 Y Y 1 34 Itasca Co Law Tac IT Law Tac Y Y 2 35 Itasca Co SO Admin IT SO Adm Y N 1 36 Itasca Co Srch amp Res IT S-R Y N 2 37 Itasca Co Probation IT Prob Y N 1 38 Itasca Co SO Jail IT SO Jail N na na9 Grand Rapids PD GR PD Ops Y Y 2 210 Drug Task Force IT DTF Y N11 Emer Response Team IT ERT Y N
12 Law Scene of Action SOA P1 N N na na
13 Grand Rapids PD Admin GR PD Adm Y N 1 414 Bigfork Police Admin BF PD Adm Y N 2 415 Bovey Police Admin BV PD Adm Y N 1 416 Coleraine Police Admin CL PD Adm Y N 2 417 Deer River Police Admin DR PD Adm Y N 1 418 Keewatin Police Admin KW PD Adm Y N 2 419 Nashwauk Police Admin NW PD Adm Y N 1 4
Talk
grou
p Na
me
Talk
grou
p Al
ias
(ABB
R)
Trun
ked
Disp
atch
Fails
oft
Chan
nel
Talk
grou
p Pr
iorit
y
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
23
Fire amp EMS Talk Groups
Talkg
roup
Na
me
Talkg
roup
Alia
s (A
BBR)
Trun
ked
Disp
atch
Fails
oft
Chan
nel
Talkg
roup
Pr
iority
Itasca Co Fire 1 IT Fire 1 Y Y 3 2Itasca Co Fire 2 IT Fire 2 Y Y 4 2Itasca Co Fire 3 IT Fire 3 Y Y 3 3
Itasca Co Fire Tac IT Fire Tac Y Y 4 4
FireEMS Scene of Action SOAFIRE1 N N na na
Balsam Fire Admin BS FD Adm Y N 3 4Bigfork Fire Admin BF FD Adm Y N 4 4Bovey Fire Admin BV FD Adm Y N 3 4
Calumet Fire Admin CA FD Adm Y N 3 4Cohasset Fire Admin CH FD Adm Y N 4 4Coleraine Fire Admin CL FD Adm Y N 3 4Deer River Fire Admin DR FD Adm Y N 4 4Goodland Fire Admin GL FD Adm Y N 3 4
Grand Rapids Fire Admin GR FD Adm Y N 4 4Keewatin Fire Admin KW FD Adm Y N 3 4Marble Fire Admin MB FD Adm Y N 4 4
Nashwauk Fire Admin NW FD Adm Y N 3 4Squaw Lake Fire Admin SQ FD Adm Y N 4 4
Taconite Fire Admin TC FD Adm Y N 3 4WarbaFeelySago Fire Admin WFS FD Adm Y N 4 4
Fire VHF Mu Aid FD Muaid Y Y 3 3Itasca Co EMS 1 IT EMS (AMB) 1 Y Y 5 2Itasca Co EMS 2 IT EMS (AMB) 2 Y Y 6 2
Itasca Co EMS Tac IT EMS (AMB) Tac Y Y 3
FireEMS Scene of Action SOAFIRE2 N N na na
Bigfork Ambulance Admin BF AMB Adm Y N 5Buck Lake 1st Responders BL 1st AdmDeer River Ambulance Admin DR AMB Adm Y N 6
Meds1 Ambulance Admin M1 AMB Adm Y N 5Naswauk Ambulance Admin NW AMB Adm
Squaw Lake 1st Resp Admin SQ 1st Adm Y N 6
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
24
Questionshellipso far
25
Simulcast Transmitting Systems
Simulcast Transmitting is defined as bull A radio system where the same radio
frequencies are Simultaneously Broadcast from all tower sites within the radio system
bull This allows same radio frequencies to be used throughout the entire coverage area
26
Simulcast Transmitting Systems
Simulcast Benefitsbull Seamless communications throughout the radio
systemrsquos coverage areabull Improved radio frequency utilizationbull Improved coverage in areas with difficult
terrainbull Improved in-building coverage (signals in
overlap zones are ldquoadditiverdquo)
27
Simulcast Transmitting Systems
Simulcast ldquoconsrdquo bull Not inexpensive technologybull Tower site spacing is critical (especially when
using NPSPAC frequencies)bull Signal ldquotimingrdquo is critical between all sitesbull Tower site interconnection (microwave T1
etc) is also critical and can be expensive
28
Simulcast Transmitting Systems
Site 1Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
29
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
Kandiyohi Co MN ndash with Simulcast
30
31
ldquoSimulcastrdquo fills in where single site canrsquot
32
Simulcast Issues
bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality
33
Simulcast Issues
bull Slightly out of phase -ldquoGhostingrdquo on a TV set
bull Out-of-phase signals can cause destructive cancellation
bull Fully in-phase signals produce constructive composite signal
34
Discussion and questions regarding Simulcast transmission
techniques and issues
35
Multicast Transmitting Systems
Multicast Transmitting is defined as bull A radio system where different radio
frequencies are used at each tower site within the radio system
Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost
36
Multicast Transmitting Systems
Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its
own set of frequencies)bull No Simulcast coverage benefits (overlap
voting)bull Units ldquoroamrdquo between sites
37
f1 f2 f3 f4 f5
f6 f7 f8 f9 f10
Kandiyohi Co MN ndash with Multicast
38
ARMER System
In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link
Typical ARMER tower site is Multicast Typical Local Ehancement system is
Simulcast
39
Zone Controller
40
Radio System Modulation Technologies
bull Analog vs DigitalMost existing Public Safety radio
systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why
41
Modulation Techniques
Analog transmission
Digital transmission
Information is sent by changing the frequency amplitude or phase of the radio signal
Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)
42
Modulation Techniques
bull Digital Benefits Clearer audio throughout system coverage
area
Improved radio frequency efficiency
Improved system coverage
Imbedded signaling options
Encryption with no range loss
43
Voting Receiver Technology
In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site
In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip
hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip
hellipwhich may be stronger than the original signal
44
Voting Receiver Systems
Site 1
Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5f1 f2 f3 f4 f5
Comparator
Received audio to System
45
Discussionamp
Questions
Slide Number 1
Presentation Agenda
ldquoTrunking 101rdquo
What is ldquoTrunkingrdquo
Conventional vs Trunked
Slide Number 6
Slide Number 7
Your Bank Tellers ndash as ldquoConventionalrdquo
Conventional vs Trunked
Trunked Radio Systems
Conventional vs Trunked
Conventional vs Trunked
Basic Trunking Diagram
Your Bank Tellers ndash as ldquoTrunkedrdquo
Conventional vs Trunked
So How Does It Work
Control Channel continuously transmits system data to all radios
Radio user presses TX button and radio information is sent via control channel to Central Controller
Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
When transmission is completed all units revert back to Control Channel
Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
Fire amp EMS Talk Groups
Questionshellipso far
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Kandiyohi Co MN ndash with Simulcast
Slide Number 31
Simulcast Issues
Simulcast Issues
Discussion and questions regarding Simulcast transmission techniques and issues
Multicast Transmitting Systems
Multicast Transmitting Systems
Kandiyohi Co MN ndash with Multicast
ARMER System
Slide Number 39
Radio System Modulation Technologies
Modulation Techniques
Modulation Techniques
Voting Receiver Technology
Voting Receiver Systems
DiscussionampQuestions
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
2
Presentation Agenda
Trunking Radio Systems ldquo101rdquobull Trunked radio vs conventional radio systems
Simulcast transmitting technology Voting receiver system technology Digital vs analog modulation technology
3
ldquoTrunking 101rdquo
CentralController
4
What is ldquoTrunkingrdquo
It is NOT a term that ldquobelongsrdquo to Motorola MaCom or any other manufacturer
It is NOT a term exclusively for radio systems It IS a generic term used to describe
ldquoThe sharing of a limited number of communications paths (or Trunks) among Many Usersrdquo
5
Conventional vs Trunked
Conventional Radio (repeater) systembull Uses a dedicated radio frequency for each
radio channel in a system (unless sharing a channel)
bull A Channel = a Frequency (Ie 154235 Mhz is County Fire)
bull Each frequency is assigned to a group of users
6
TXRX
FD
Fire Channel154235 MhzTX
RX
EMS Channel155340
TXRX
Law Repeater Channel 155625 Mhz
EMS
PD
7
TXRX
FD
Fire Channel154235 Mhz
TXRX
EMS Channel155340
TXRX
Law Repeater Channel 155625 Mhz
EMS
PD1PD2
X
8
Your Bank Tellers ndash as ldquoConventionalrdquo
PD FireEMS PWAdmin
EMS FD
FDPD
PD
Queueby
Account
9
Conventional vs Trunked
Conventional Radio (base or repeater) systembull A Channel = a Frequencybull If a channel is in use radio user must wait in
ldquoqueuerdquo before being able to transmit on the system
bull hellipand a new frequency must be obtained each time another ldquochannelrdquo is needed in the radio system
bull The system is limited by the number of frequencies in the systemhellip
10
Trunked Radio Systems
CentralController
11
Conventional vs Trunked
Trunked Radio (repeater) systembull Uses a group of similar radio frequencies to
create a ldquopoolrdquo for radio system users to accessbull Systems can be built using VHF UHF or 800
Mhzbull A Channel is NOT a Frequencyhellip(generally)bull A Channel (on your radio) is now a computer-
generated codebull hellipand are now referred to as ldquoTalk Groupsrdquo
12
Conventional vs Trunked
Trunked Radio (repeater) systembull The entire system is managed by a computer
often referred to as the ldquoCentral Controllerrdquobull All radios in the system also are computer-
controlled and communicate to the central controller via one frequency known as the ldquoControl Channelrdquo
13
EMS
1 to 28 Channels
CH 1
CentralController
TX RX
CH 2
RXTX
CH 3
RXTX
CH 4
RXTX
CH 28
RXTX
ControlChannel
PD
Basic Trunking Diagram
FD
14
Your Bank Tellers ndash as ldquoTrunkedrdquo
Director CH 5CH 3 CH 4CH 2
EMS FD
PD
PD
Queueby
FirstAvailable
Teller
FD
IN
15
Conventional vs Trunked
Trunked Radio Benefits bull Greatly improved usage of scarce radio
frequenciesbull Greater overall radio system flexibility
includingChannel (Talk Group) capabilitiesVarious user features including Emergency
Alarm PTT ID Channel Regrouping Call Alert and Radio Inhibit
bull Brings radio users together on a common radio system
bull Consistency in radio coverage
16
So How Does It Work
17
Control Channel continuously transmits system data to all radios PD
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FDEMS
18
Radio user presses TX button and radio information is sent via control channel to
Central Controller
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
19
Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios
selected on same Talk Group
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
FD
20
Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the
voice transmission
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
FD
21
When transmission is completed all units revert back to Control Channel
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
FD
22
Radio System Fleetmapping
Radio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo
(Law Enforcement shown here)
1 Itasca Co Law 1 IT Law 1 Y Y 1 22 Itasca Co Law 2 IT Law 2 Y Y 2 23 Itasca Co Law 3 IT Law 3 Y Y 1 34 Itasca Co Law Tac IT Law Tac Y Y 2 35 Itasca Co SO Admin IT SO Adm Y N 1 36 Itasca Co Srch amp Res IT S-R Y N 2 37 Itasca Co Probation IT Prob Y N 1 38 Itasca Co SO Jail IT SO Jail N na na9 Grand Rapids PD GR PD Ops Y Y 2 210 Drug Task Force IT DTF Y N11 Emer Response Team IT ERT Y N
12 Law Scene of Action SOA P1 N N na na
13 Grand Rapids PD Admin GR PD Adm Y N 1 414 Bigfork Police Admin BF PD Adm Y N 2 415 Bovey Police Admin BV PD Adm Y N 1 416 Coleraine Police Admin CL PD Adm Y N 2 417 Deer River Police Admin DR PD Adm Y N 1 418 Keewatin Police Admin KW PD Adm Y N 2 419 Nashwauk Police Admin NW PD Adm Y N 1 4
Talk
grou
p Na
me
Talk
grou
p Al
ias
(ABB
R)
Trun
ked
Disp
atch
Fails
oft
Chan
nel
Talk
grou
p Pr
iorit
y
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
23
Fire amp EMS Talk Groups
Talkg
roup
Na
me
Talkg
roup
Alia
s (A
BBR)
Trun
ked
Disp
atch
Fails
oft
Chan
nel
Talkg
roup
Pr
iority
Itasca Co Fire 1 IT Fire 1 Y Y 3 2Itasca Co Fire 2 IT Fire 2 Y Y 4 2Itasca Co Fire 3 IT Fire 3 Y Y 3 3
Itasca Co Fire Tac IT Fire Tac Y Y 4 4
FireEMS Scene of Action SOAFIRE1 N N na na
Balsam Fire Admin BS FD Adm Y N 3 4Bigfork Fire Admin BF FD Adm Y N 4 4Bovey Fire Admin BV FD Adm Y N 3 4
Calumet Fire Admin CA FD Adm Y N 3 4Cohasset Fire Admin CH FD Adm Y N 4 4Coleraine Fire Admin CL FD Adm Y N 3 4Deer River Fire Admin DR FD Adm Y N 4 4Goodland Fire Admin GL FD Adm Y N 3 4
Grand Rapids Fire Admin GR FD Adm Y N 4 4Keewatin Fire Admin KW FD Adm Y N 3 4Marble Fire Admin MB FD Adm Y N 4 4
Nashwauk Fire Admin NW FD Adm Y N 3 4Squaw Lake Fire Admin SQ FD Adm Y N 4 4
Taconite Fire Admin TC FD Adm Y N 3 4WarbaFeelySago Fire Admin WFS FD Adm Y N 4 4
Fire VHF Mu Aid FD Muaid Y Y 3 3Itasca Co EMS 1 IT EMS (AMB) 1 Y Y 5 2Itasca Co EMS 2 IT EMS (AMB) 2 Y Y 6 2
Itasca Co EMS Tac IT EMS (AMB) Tac Y Y 3
FireEMS Scene of Action SOAFIRE2 N N na na
Bigfork Ambulance Admin BF AMB Adm Y N 5Buck Lake 1st Responders BL 1st AdmDeer River Ambulance Admin DR AMB Adm Y N 6
Meds1 Ambulance Admin M1 AMB Adm Y N 5Naswauk Ambulance Admin NW AMB Adm
Squaw Lake 1st Resp Admin SQ 1st Adm Y N 6
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
24
Questionshellipso far
25
Simulcast Transmitting Systems
Simulcast Transmitting is defined as bull A radio system where the same radio
frequencies are Simultaneously Broadcast from all tower sites within the radio system
bull This allows same radio frequencies to be used throughout the entire coverage area
26
Simulcast Transmitting Systems
Simulcast Benefitsbull Seamless communications throughout the radio
systemrsquos coverage areabull Improved radio frequency utilizationbull Improved coverage in areas with difficult
terrainbull Improved in-building coverage (signals in
overlap zones are ldquoadditiverdquo)
27
Simulcast Transmitting Systems
Simulcast ldquoconsrdquo bull Not inexpensive technologybull Tower site spacing is critical (especially when
using NPSPAC frequencies)bull Signal ldquotimingrdquo is critical between all sitesbull Tower site interconnection (microwave T1
etc) is also critical and can be expensive
28
Simulcast Transmitting Systems
Site 1Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
29
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
Kandiyohi Co MN ndash with Simulcast
30
31
ldquoSimulcastrdquo fills in where single site canrsquot
32
Simulcast Issues
bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality
33
Simulcast Issues
bull Slightly out of phase -ldquoGhostingrdquo on a TV set
bull Out-of-phase signals can cause destructive cancellation
bull Fully in-phase signals produce constructive composite signal
34
Discussion and questions regarding Simulcast transmission
techniques and issues
35
Multicast Transmitting Systems
Multicast Transmitting is defined as bull A radio system where different radio
frequencies are used at each tower site within the radio system
Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost
36
Multicast Transmitting Systems
Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its
own set of frequencies)bull No Simulcast coverage benefits (overlap
voting)bull Units ldquoroamrdquo between sites
37
f1 f2 f3 f4 f5
f6 f7 f8 f9 f10
Kandiyohi Co MN ndash with Multicast
38
ARMER System
In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link
Typical ARMER tower site is Multicast Typical Local Ehancement system is
Simulcast
39
Zone Controller
40
Radio System Modulation Technologies
bull Analog vs DigitalMost existing Public Safety radio
systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why
41
Modulation Techniques
Analog transmission
Digital transmission
Information is sent by changing the frequency amplitude or phase of the radio signal
Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)
42
Modulation Techniques
bull Digital Benefits Clearer audio throughout system coverage
area
Improved radio frequency efficiency
Improved system coverage
Imbedded signaling options
Encryption with no range loss
43
Voting Receiver Technology
In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site
In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip
hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip
hellipwhich may be stronger than the original signal
44
Voting Receiver Systems
Site 1
Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5f1 f2 f3 f4 f5
Comparator
Received audio to System
45
Discussionamp
Questions
Slide Number 1
Presentation Agenda
ldquoTrunking 101rdquo
What is ldquoTrunkingrdquo
Conventional vs Trunked
Slide Number 6
Slide Number 7
Your Bank Tellers ndash as ldquoConventionalrdquo
Conventional vs Trunked
Trunked Radio Systems
Conventional vs Trunked
Conventional vs Trunked
Basic Trunking Diagram
Your Bank Tellers ndash as ldquoTrunkedrdquo
Conventional vs Trunked
So How Does It Work
Control Channel continuously transmits system data to all radios
Radio user presses TX button and radio information is sent via control channel to Central Controller
Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
When transmission is completed all units revert back to Control Channel
Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
Fire amp EMS Talk Groups
Questionshellipso far
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Kandiyohi Co MN ndash with Simulcast
Slide Number 31
Simulcast Issues
Simulcast Issues
Discussion and questions regarding Simulcast transmission techniques and issues
Multicast Transmitting Systems
Multicast Transmitting Systems
Kandiyohi Co MN ndash with Multicast
ARMER System
Slide Number 39
Radio System Modulation Technologies
Modulation Techniques
Modulation Techniques
Voting Receiver Technology
Voting Receiver Systems
DiscussionampQuestions
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
3
ldquoTrunking 101rdquo
CentralController
4
What is ldquoTrunkingrdquo
It is NOT a term that ldquobelongsrdquo to Motorola MaCom or any other manufacturer
It is NOT a term exclusively for radio systems It IS a generic term used to describe
ldquoThe sharing of a limited number of communications paths (or Trunks) among Many Usersrdquo
5
Conventional vs Trunked
Conventional Radio (repeater) systembull Uses a dedicated radio frequency for each
radio channel in a system (unless sharing a channel)
bull A Channel = a Frequency (Ie 154235 Mhz is County Fire)
bull Each frequency is assigned to a group of users
6
TXRX
FD
Fire Channel154235 MhzTX
RX
EMS Channel155340
TXRX
Law Repeater Channel 155625 Mhz
EMS
PD
7
TXRX
FD
Fire Channel154235 Mhz
TXRX
EMS Channel155340
TXRX
Law Repeater Channel 155625 Mhz
EMS
PD1PD2
X
8
Your Bank Tellers ndash as ldquoConventionalrdquo
PD FireEMS PWAdmin
EMS FD
FDPD
PD
Queueby
Account
9
Conventional vs Trunked
Conventional Radio (base or repeater) systembull A Channel = a Frequencybull If a channel is in use radio user must wait in
ldquoqueuerdquo before being able to transmit on the system
bull hellipand a new frequency must be obtained each time another ldquochannelrdquo is needed in the radio system
bull The system is limited by the number of frequencies in the systemhellip
10
Trunked Radio Systems
CentralController
11
Conventional vs Trunked
Trunked Radio (repeater) systembull Uses a group of similar radio frequencies to
create a ldquopoolrdquo for radio system users to accessbull Systems can be built using VHF UHF or 800
Mhzbull A Channel is NOT a Frequencyhellip(generally)bull A Channel (on your radio) is now a computer-
generated codebull hellipand are now referred to as ldquoTalk Groupsrdquo
12
Conventional vs Trunked
Trunked Radio (repeater) systembull The entire system is managed by a computer
often referred to as the ldquoCentral Controllerrdquobull All radios in the system also are computer-
controlled and communicate to the central controller via one frequency known as the ldquoControl Channelrdquo
13
EMS
1 to 28 Channels
CH 1
CentralController
TX RX
CH 2
RXTX
CH 3
RXTX
CH 4
RXTX
CH 28
RXTX
ControlChannel
PD
Basic Trunking Diagram
FD
14
Your Bank Tellers ndash as ldquoTrunkedrdquo
Director CH 5CH 3 CH 4CH 2
EMS FD
PD
PD
Queueby
FirstAvailable
Teller
FD
IN
15
Conventional vs Trunked
Trunked Radio Benefits bull Greatly improved usage of scarce radio
frequenciesbull Greater overall radio system flexibility
includingChannel (Talk Group) capabilitiesVarious user features including Emergency
Alarm PTT ID Channel Regrouping Call Alert and Radio Inhibit
bull Brings radio users together on a common radio system
bull Consistency in radio coverage
16
So How Does It Work
17
Control Channel continuously transmits system data to all radios PD
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FDEMS
18
Radio user presses TX button and radio information is sent via control channel to
Central Controller
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
19
Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios
selected on same Talk Group
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
FD
20
Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the
voice transmission
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
FD
21
When transmission is completed all units revert back to Control Channel
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
FD
22
Radio System Fleetmapping
Radio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo
(Law Enforcement shown here)
1 Itasca Co Law 1 IT Law 1 Y Y 1 22 Itasca Co Law 2 IT Law 2 Y Y 2 23 Itasca Co Law 3 IT Law 3 Y Y 1 34 Itasca Co Law Tac IT Law Tac Y Y 2 35 Itasca Co SO Admin IT SO Adm Y N 1 36 Itasca Co Srch amp Res IT S-R Y N 2 37 Itasca Co Probation IT Prob Y N 1 38 Itasca Co SO Jail IT SO Jail N na na9 Grand Rapids PD GR PD Ops Y Y 2 210 Drug Task Force IT DTF Y N11 Emer Response Team IT ERT Y N
12 Law Scene of Action SOA P1 N N na na
13 Grand Rapids PD Admin GR PD Adm Y N 1 414 Bigfork Police Admin BF PD Adm Y N 2 415 Bovey Police Admin BV PD Adm Y N 1 416 Coleraine Police Admin CL PD Adm Y N 2 417 Deer River Police Admin DR PD Adm Y N 1 418 Keewatin Police Admin KW PD Adm Y N 2 419 Nashwauk Police Admin NW PD Adm Y N 1 4
Talk
grou
p Na
me
Talk
grou
p Al
ias
(ABB
R)
Trun
ked
Disp
atch
Fails
oft
Chan
nel
Talk
grou
p Pr
iorit
y
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
23
Fire amp EMS Talk Groups
Talkg
roup
Na
me
Talkg
roup
Alia
s (A
BBR)
Trun
ked
Disp
atch
Fails
oft
Chan
nel
Talkg
roup
Pr
iority
Itasca Co Fire 1 IT Fire 1 Y Y 3 2Itasca Co Fire 2 IT Fire 2 Y Y 4 2Itasca Co Fire 3 IT Fire 3 Y Y 3 3
Itasca Co Fire Tac IT Fire Tac Y Y 4 4
FireEMS Scene of Action SOAFIRE1 N N na na
Balsam Fire Admin BS FD Adm Y N 3 4Bigfork Fire Admin BF FD Adm Y N 4 4Bovey Fire Admin BV FD Adm Y N 3 4
Calumet Fire Admin CA FD Adm Y N 3 4Cohasset Fire Admin CH FD Adm Y N 4 4Coleraine Fire Admin CL FD Adm Y N 3 4Deer River Fire Admin DR FD Adm Y N 4 4Goodland Fire Admin GL FD Adm Y N 3 4
Grand Rapids Fire Admin GR FD Adm Y N 4 4Keewatin Fire Admin KW FD Adm Y N 3 4Marble Fire Admin MB FD Adm Y N 4 4
Nashwauk Fire Admin NW FD Adm Y N 3 4Squaw Lake Fire Admin SQ FD Adm Y N 4 4
Taconite Fire Admin TC FD Adm Y N 3 4WarbaFeelySago Fire Admin WFS FD Adm Y N 4 4
Fire VHF Mu Aid FD Muaid Y Y 3 3Itasca Co EMS 1 IT EMS (AMB) 1 Y Y 5 2Itasca Co EMS 2 IT EMS (AMB) 2 Y Y 6 2
Itasca Co EMS Tac IT EMS (AMB) Tac Y Y 3
FireEMS Scene of Action SOAFIRE2 N N na na
Bigfork Ambulance Admin BF AMB Adm Y N 5Buck Lake 1st Responders BL 1st AdmDeer River Ambulance Admin DR AMB Adm Y N 6
Meds1 Ambulance Admin M1 AMB Adm Y N 5Naswauk Ambulance Admin NW AMB Adm
Squaw Lake 1st Resp Admin SQ 1st Adm Y N 6
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
24
Questionshellipso far
25
Simulcast Transmitting Systems
Simulcast Transmitting is defined as bull A radio system where the same radio
frequencies are Simultaneously Broadcast from all tower sites within the radio system
bull This allows same radio frequencies to be used throughout the entire coverage area
26
Simulcast Transmitting Systems
Simulcast Benefitsbull Seamless communications throughout the radio
systemrsquos coverage areabull Improved radio frequency utilizationbull Improved coverage in areas with difficult
terrainbull Improved in-building coverage (signals in
overlap zones are ldquoadditiverdquo)
27
Simulcast Transmitting Systems
Simulcast ldquoconsrdquo bull Not inexpensive technologybull Tower site spacing is critical (especially when
using NPSPAC frequencies)bull Signal ldquotimingrdquo is critical between all sitesbull Tower site interconnection (microwave T1
etc) is also critical and can be expensive
28
Simulcast Transmitting Systems
Site 1Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
29
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
Kandiyohi Co MN ndash with Simulcast
30
31
ldquoSimulcastrdquo fills in where single site canrsquot
32
Simulcast Issues
bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality
33
Simulcast Issues
bull Slightly out of phase -ldquoGhostingrdquo on a TV set
bull Out-of-phase signals can cause destructive cancellation
bull Fully in-phase signals produce constructive composite signal
34
Discussion and questions regarding Simulcast transmission
techniques and issues
35
Multicast Transmitting Systems
Multicast Transmitting is defined as bull A radio system where different radio
frequencies are used at each tower site within the radio system
Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost
36
Multicast Transmitting Systems
Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its
own set of frequencies)bull No Simulcast coverage benefits (overlap
voting)bull Units ldquoroamrdquo between sites
37
f1 f2 f3 f4 f5
f6 f7 f8 f9 f10
Kandiyohi Co MN ndash with Multicast
38
ARMER System
In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link
Typical ARMER tower site is Multicast Typical Local Ehancement system is
Simulcast
39
Zone Controller
40
Radio System Modulation Technologies
bull Analog vs DigitalMost existing Public Safety radio
systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why
41
Modulation Techniques
Analog transmission
Digital transmission
Information is sent by changing the frequency amplitude or phase of the radio signal
Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)
42
Modulation Techniques
bull Digital Benefits Clearer audio throughout system coverage
area
Improved radio frequency efficiency
Improved system coverage
Imbedded signaling options
Encryption with no range loss
43
Voting Receiver Technology
In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site
In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip
hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip
hellipwhich may be stronger than the original signal
44
Voting Receiver Systems
Site 1
Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5f1 f2 f3 f4 f5
Comparator
Received audio to System
45
Discussionamp
Questions
Slide Number 1
Presentation Agenda
ldquoTrunking 101rdquo
What is ldquoTrunkingrdquo
Conventional vs Trunked
Slide Number 6
Slide Number 7
Your Bank Tellers ndash as ldquoConventionalrdquo
Conventional vs Trunked
Trunked Radio Systems
Conventional vs Trunked
Conventional vs Trunked
Basic Trunking Diagram
Your Bank Tellers ndash as ldquoTrunkedrdquo
Conventional vs Trunked
So How Does It Work
Control Channel continuously transmits system data to all radios
Radio user presses TX button and radio information is sent via control channel to Central Controller
Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
When transmission is completed all units revert back to Control Channel
Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
Fire amp EMS Talk Groups
Questionshellipso far
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Kandiyohi Co MN ndash with Simulcast
Slide Number 31
Simulcast Issues
Simulcast Issues
Discussion and questions regarding Simulcast transmission techniques and issues
Multicast Transmitting Systems
Multicast Transmitting Systems
Kandiyohi Co MN ndash with Multicast
ARMER System
Slide Number 39
Radio System Modulation Technologies
Modulation Techniques
Modulation Techniques
Voting Receiver Technology
Voting Receiver Systems
DiscussionampQuestions
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
4
What is ldquoTrunkingrdquo
It is NOT a term that ldquobelongsrdquo to Motorola MaCom or any other manufacturer
It is NOT a term exclusively for radio systems It IS a generic term used to describe
ldquoThe sharing of a limited number of communications paths (or Trunks) among Many Usersrdquo
5
Conventional vs Trunked
Conventional Radio (repeater) systembull Uses a dedicated radio frequency for each
radio channel in a system (unless sharing a channel)
bull A Channel = a Frequency (Ie 154235 Mhz is County Fire)
bull Each frequency is assigned to a group of users
6
TXRX
FD
Fire Channel154235 MhzTX
RX
EMS Channel155340
TXRX
Law Repeater Channel 155625 Mhz
EMS
PD
7
TXRX
FD
Fire Channel154235 Mhz
TXRX
EMS Channel155340
TXRX
Law Repeater Channel 155625 Mhz
EMS
PD1PD2
X
8
Your Bank Tellers ndash as ldquoConventionalrdquo
PD FireEMS PWAdmin
EMS FD
FDPD
PD
Queueby
Account
9
Conventional vs Trunked
Conventional Radio (base or repeater) systembull A Channel = a Frequencybull If a channel is in use radio user must wait in
ldquoqueuerdquo before being able to transmit on the system
bull hellipand a new frequency must be obtained each time another ldquochannelrdquo is needed in the radio system
bull The system is limited by the number of frequencies in the systemhellip
10
Trunked Radio Systems
CentralController
11
Conventional vs Trunked
Trunked Radio (repeater) systembull Uses a group of similar radio frequencies to
create a ldquopoolrdquo for radio system users to accessbull Systems can be built using VHF UHF or 800
Mhzbull A Channel is NOT a Frequencyhellip(generally)bull A Channel (on your radio) is now a computer-
generated codebull hellipand are now referred to as ldquoTalk Groupsrdquo
12
Conventional vs Trunked
Trunked Radio (repeater) systembull The entire system is managed by a computer
often referred to as the ldquoCentral Controllerrdquobull All radios in the system also are computer-
controlled and communicate to the central controller via one frequency known as the ldquoControl Channelrdquo
13
EMS
1 to 28 Channels
CH 1
CentralController
TX RX
CH 2
RXTX
CH 3
RXTX
CH 4
RXTX
CH 28
RXTX
ControlChannel
PD
Basic Trunking Diagram
FD
14
Your Bank Tellers ndash as ldquoTrunkedrdquo
Director CH 5CH 3 CH 4CH 2
EMS FD
PD
PD
Queueby
FirstAvailable
Teller
FD
IN
15
Conventional vs Trunked
Trunked Radio Benefits bull Greatly improved usage of scarce radio
frequenciesbull Greater overall radio system flexibility
includingChannel (Talk Group) capabilitiesVarious user features including Emergency
Alarm PTT ID Channel Regrouping Call Alert and Radio Inhibit
bull Brings radio users together on a common radio system
bull Consistency in radio coverage
16
So How Does It Work
17
Control Channel continuously transmits system data to all radios PD
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FDEMS
18
Radio user presses TX button and radio information is sent via control channel to
Central Controller
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
19
Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios
selected on same Talk Group
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
FD
20
Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the
voice transmission
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
FD
21
When transmission is completed all units revert back to Control Channel
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
FD
22
Radio System Fleetmapping
Radio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo
(Law Enforcement shown here)
1 Itasca Co Law 1 IT Law 1 Y Y 1 22 Itasca Co Law 2 IT Law 2 Y Y 2 23 Itasca Co Law 3 IT Law 3 Y Y 1 34 Itasca Co Law Tac IT Law Tac Y Y 2 35 Itasca Co SO Admin IT SO Adm Y N 1 36 Itasca Co Srch amp Res IT S-R Y N 2 37 Itasca Co Probation IT Prob Y N 1 38 Itasca Co SO Jail IT SO Jail N na na9 Grand Rapids PD GR PD Ops Y Y 2 210 Drug Task Force IT DTF Y N11 Emer Response Team IT ERT Y N
12 Law Scene of Action SOA P1 N N na na
13 Grand Rapids PD Admin GR PD Adm Y N 1 414 Bigfork Police Admin BF PD Adm Y N 2 415 Bovey Police Admin BV PD Adm Y N 1 416 Coleraine Police Admin CL PD Adm Y N 2 417 Deer River Police Admin DR PD Adm Y N 1 418 Keewatin Police Admin KW PD Adm Y N 2 419 Nashwauk Police Admin NW PD Adm Y N 1 4
Talk
grou
p Na
me
Talk
grou
p Al
ias
(ABB
R)
Trun
ked
Disp
atch
Fails
oft
Chan
nel
Talk
grou
p Pr
iorit
y
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
23
Fire amp EMS Talk Groups
Talkg
roup
Na
me
Talkg
roup
Alia
s (A
BBR)
Trun
ked
Disp
atch
Fails
oft
Chan
nel
Talkg
roup
Pr
iority
Itasca Co Fire 1 IT Fire 1 Y Y 3 2Itasca Co Fire 2 IT Fire 2 Y Y 4 2Itasca Co Fire 3 IT Fire 3 Y Y 3 3
Itasca Co Fire Tac IT Fire Tac Y Y 4 4
FireEMS Scene of Action SOAFIRE1 N N na na
Balsam Fire Admin BS FD Adm Y N 3 4Bigfork Fire Admin BF FD Adm Y N 4 4Bovey Fire Admin BV FD Adm Y N 3 4
Calumet Fire Admin CA FD Adm Y N 3 4Cohasset Fire Admin CH FD Adm Y N 4 4Coleraine Fire Admin CL FD Adm Y N 3 4Deer River Fire Admin DR FD Adm Y N 4 4Goodland Fire Admin GL FD Adm Y N 3 4
Grand Rapids Fire Admin GR FD Adm Y N 4 4Keewatin Fire Admin KW FD Adm Y N 3 4Marble Fire Admin MB FD Adm Y N 4 4
Nashwauk Fire Admin NW FD Adm Y N 3 4Squaw Lake Fire Admin SQ FD Adm Y N 4 4
Taconite Fire Admin TC FD Adm Y N 3 4WarbaFeelySago Fire Admin WFS FD Adm Y N 4 4
Fire VHF Mu Aid FD Muaid Y Y 3 3Itasca Co EMS 1 IT EMS (AMB) 1 Y Y 5 2Itasca Co EMS 2 IT EMS (AMB) 2 Y Y 6 2
Itasca Co EMS Tac IT EMS (AMB) Tac Y Y 3
FireEMS Scene of Action SOAFIRE2 N N na na
Bigfork Ambulance Admin BF AMB Adm Y N 5Buck Lake 1st Responders BL 1st AdmDeer River Ambulance Admin DR AMB Adm Y N 6
Meds1 Ambulance Admin M1 AMB Adm Y N 5Naswauk Ambulance Admin NW AMB Adm
Squaw Lake 1st Resp Admin SQ 1st Adm Y N 6
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
24
Questionshellipso far
25
Simulcast Transmitting Systems
Simulcast Transmitting is defined as bull A radio system where the same radio
frequencies are Simultaneously Broadcast from all tower sites within the radio system
bull This allows same radio frequencies to be used throughout the entire coverage area
26
Simulcast Transmitting Systems
Simulcast Benefitsbull Seamless communications throughout the radio
systemrsquos coverage areabull Improved radio frequency utilizationbull Improved coverage in areas with difficult
terrainbull Improved in-building coverage (signals in
overlap zones are ldquoadditiverdquo)
27
Simulcast Transmitting Systems
Simulcast ldquoconsrdquo bull Not inexpensive technologybull Tower site spacing is critical (especially when
using NPSPAC frequencies)bull Signal ldquotimingrdquo is critical between all sitesbull Tower site interconnection (microwave T1
etc) is also critical and can be expensive
28
Simulcast Transmitting Systems
Site 1Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
29
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
Kandiyohi Co MN ndash with Simulcast
30
31
ldquoSimulcastrdquo fills in where single site canrsquot
32
Simulcast Issues
bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality
33
Simulcast Issues
bull Slightly out of phase -ldquoGhostingrdquo on a TV set
bull Out-of-phase signals can cause destructive cancellation
bull Fully in-phase signals produce constructive composite signal
34
Discussion and questions regarding Simulcast transmission
techniques and issues
35
Multicast Transmitting Systems
Multicast Transmitting is defined as bull A radio system where different radio
frequencies are used at each tower site within the radio system
Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost
36
Multicast Transmitting Systems
Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its
own set of frequencies)bull No Simulcast coverage benefits (overlap
voting)bull Units ldquoroamrdquo between sites
37
f1 f2 f3 f4 f5
f6 f7 f8 f9 f10
Kandiyohi Co MN ndash with Multicast
38
ARMER System
In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link
Typical ARMER tower site is Multicast Typical Local Ehancement system is
Simulcast
39
Zone Controller
40
Radio System Modulation Technologies
bull Analog vs DigitalMost existing Public Safety radio
systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why
41
Modulation Techniques
Analog transmission
Digital transmission
Information is sent by changing the frequency amplitude or phase of the radio signal
Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)
42
Modulation Techniques
bull Digital Benefits Clearer audio throughout system coverage
area
Improved radio frequency efficiency
Improved system coverage
Imbedded signaling options
Encryption with no range loss
43
Voting Receiver Technology
In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site
In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip
hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip
hellipwhich may be stronger than the original signal
44
Voting Receiver Systems
Site 1
Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5f1 f2 f3 f4 f5
Comparator
Received audio to System
45
Discussionamp
Questions
Slide Number 1
Presentation Agenda
ldquoTrunking 101rdquo
What is ldquoTrunkingrdquo
Conventional vs Trunked
Slide Number 6
Slide Number 7
Your Bank Tellers ndash as ldquoConventionalrdquo
Conventional vs Trunked
Trunked Radio Systems
Conventional vs Trunked
Conventional vs Trunked
Basic Trunking Diagram
Your Bank Tellers ndash as ldquoTrunkedrdquo
Conventional vs Trunked
So How Does It Work
Control Channel continuously transmits system data to all radios
Radio user presses TX button and radio information is sent via control channel to Central Controller
Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
When transmission is completed all units revert back to Control Channel
Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
Fire amp EMS Talk Groups
Questionshellipso far
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Kandiyohi Co MN ndash with Simulcast
Slide Number 31
Simulcast Issues
Simulcast Issues
Discussion and questions regarding Simulcast transmission techniques and issues
Multicast Transmitting Systems
Multicast Transmitting Systems
Kandiyohi Co MN ndash with Multicast
ARMER System
Slide Number 39
Radio System Modulation Technologies
Modulation Techniques
Modulation Techniques
Voting Receiver Technology
Voting Receiver Systems
DiscussionampQuestions
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
5
Conventional vs Trunked
Conventional Radio (repeater) systembull Uses a dedicated radio frequency for each
radio channel in a system (unless sharing a channel)
bull A Channel = a Frequency (Ie 154235 Mhz is County Fire)
bull Each frequency is assigned to a group of users
6
TXRX
FD
Fire Channel154235 MhzTX
RX
EMS Channel155340
TXRX
Law Repeater Channel 155625 Mhz
EMS
PD
7
TXRX
FD
Fire Channel154235 Mhz
TXRX
EMS Channel155340
TXRX
Law Repeater Channel 155625 Mhz
EMS
PD1PD2
X
8
Your Bank Tellers ndash as ldquoConventionalrdquo
PD FireEMS PWAdmin
EMS FD
FDPD
PD
Queueby
Account
9
Conventional vs Trunked
Conventional Radio (base or repeater) systembull A Channel = a Frequencybull If a channel is in use radio user must wait in
ldquoqueuerdquo before being able to transmit on the system
bull hellipand a new frequency must be obtained each time another ldquochannelrdquo is needed in the radio system
bull The system is limited by the number of frequencies in the systemhellip
10
Trunked Radio Systems
CentralController
11
Conventional vs Trunked
Trunked Radio (repeater) systembull Uses a group of similar radio frequencies to
create a ldquopoolrdquo for radio system users to accessbull Systems can be built using VHF UHF or 800
Mhzbull A Channel is NOT a Frequencyhellip(generally)bull A Channel (on your radio) is now a computer-
generated codebull hellipand are now referred to as ldquoTalk Groupsrdquo
12
Conventional vs Trunked
Trunked Radio (repeater) systembull The entire system is managed by a computer
often referred to as the ldquoCentral Controllerrdquobull All radios in the system also are computer-
controlled and communicate to the central controller via one frequency known as the ldquoControl Channelrdquo
13
EMS
1 to 28 Channels
CH 1
CentralController
TX RX
CH 2
RXTX
CH 3
RXTX
CH 4
RXTX
CH 28
RXTX
ControlChannel
PD
Basic Trunking Diagram
FD
14
Your Bank Tellers ndash as ldquoTrunkedrdquo
Director CH 5CH 3 CH 4CH 2
EMS FD
PD
PD
Queueby
FirstAvailable
Teller
FD
IN
15
Conventional vs Trunked
Trunked Radio Benefits bull Greatly improved usage of scarce radio
frequenciesbull Greater overall radio system flexibility
includingChannel (Talk Group) capabilitiesVarious user features including Emergency
Alarm PTT ID Channel Regrouping Call Alert and Radio Inhibit
bull Brings radio users together on a common radio system
bull Consistency in radio coverage
16
So How Does It Work
17
Control Channel continuously transmits system data to all radios PD
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FDEMS
18
Radio user presses TX button and radio information is sent via control channel to
Central Controller
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
19
Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios
selected on same Talk Group
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
FD
20
Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the
voice transmission
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
FD
21
When transmission is completed all units revert back to Control Channel
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
FD
22
Radio System Fleetmapping
Radio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo
(Law Enforcement shown here)
1 Itasca Co Law 1 IT Law 1 Y Y 1 22 Itasca Co Law 2 IT Law 2 Y Y 2 23 Itasca Co Law 3 IT Law 3 Y Y 1 34 Itasca Co Law Tac IT Law Tac Y Y 2 35 Itasca Co SO Admin IT SO Adm Y N 1 36 Itasca Co Srch amp Res IT S-R Y N 2 37 Itasca Co Probation IT Prob Y N 1 38 Itasca Co SO Jail IT SO Jail N na na9 Grand Rapids PD GR PD Ops Y Y 2 210 Drug Task Force IT DTF Y N11 Emer Response Team IT ERT Y N
12 Law Scene of Action SOA P1 N N na na
13 Grand Rapids PD Admin GR PD Adm Y N 1 414 Bigfork Police Admin BF PD Adm Y N 2 415 Bovey Police Admin BV PD Adm Y N 1 416 Coleraine Police Admin CL PD Adm Y N 2 417 Deer River Police Admin DR PD Adm Y N 1 418 Keewatin Police Admin KW PD Adm Y N 2 419 Nashwauk Police Admin NW PD Adm Y N 1 4
Talk
grou
p Na
me
Talk
grou
p Al
ias
(ABB
R)
Trun
ked
Disp
atch
Fails
oft
Chan
nel
Talk
grou
p Pr
iorit
y
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
23
Fire amp EMS Talk Groups
Talkg
roup
Na
me
Talkg
roup
Alia
s (A
BBR)
Trun
ked
Disp
atch
Fails
oft
Chan
nel
Talkg
roup
Pr
iority
Itasca Co Fire 1 IT Fire 1 Y Y 3 2Itasca Co Fire 2 IT Fire 2 Y Y 4 2Itasca Co Fire 3 IT Fire 3 Y Y 3 3
Itasca Co Fire Tac IT Fire Tac Y Y 4 4
FireEMS Scene of Action SOAFIRE1 N N na na
Balsam Fire Admin BS FD Adm Y N 3 4Bigfork Fire Admin BF FD Adm Y N 4 4Bovey Fire Admin BV FD Adm Y N 3 4
Calumet Fire Admin CA FD Adm Y N 3 4Cohasset Fire Admin CH FD Adm Y N 4 4Coleraine Fire Admin CL FD Adm Y N 3 4Deer River Fire Admin DR FD Adm Y N 4 4Goodland Fire Admin GL FD Adm Y N 3 4
Grand Rapids Fire Admin GR FD Adm Y N 4 4Keewatin Fire Admin KW FD Adm Y N 3 4Marble Fire Admin MB FD Adm Y N 4 4
Nashwauk Fire Admin NW FD Adm Y N 3 4Squaw Lake Fire Admin SQ FD Adm Y N 4 4
Taconite Fire Admin TC FD Adm Y N 3 4WarbaFeelySago Fire Admin WFS FD Adm Y N 4 4
Fire VHF Mu Aid FD Muaid Y Y 3 3Itasca Co EMS 1 IT EMS (AMB) 1 Y Y 5 2Itasca Co EMS 2 IT EMS (AMB) 2 Y Y 6 2
Itasca Co EMS Tac IT EMS (AMB) Tac Y Y 3
FireEMS Scene of Action SOAFIRE2 N N na na
Bigfork Ambulance Admin BF AMB Adm Y N 5Buck Lake 1st Responders BL 1st AdmDeer River Ambulance Admin DR AMB Adm Y N 6
Meds1 Ambulance Admin M1 AMB Adm Y N 5Naswauk Ambulance Admin NW AMB Adm
Squaw Lake 1st Resp Admin SQ 1st Adm Y N 6
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
24
Questionshellipso far
25
Simulcast Transmitting Systems
Simulcast Transmitting is defined as bull A radio system where the same radio
frequencies are Simultaneously Broadcast from all tower sites within the radio system
bull This allows same radio frequencies to be used throughout the entire coverage area
26
Simulcast Transmitting Systems
Simulcast Benefitsbull Seamless communications throughout the radio
systemrsquos coverage areabull Improved radio frequency utilizationbull Improved coverage in areas with difficult
terrainbull Improved in-building coverage (signals in
overlap zones are ldquoadditiverdquo)
27
Simulcast Transmitting Systems
Simulcast ldquoconsrdquo bull Not inexpensive technologybull Tower site spacing is critical (especially when
using NPSPAC frequencies)bull Signal ldquotimingrdquo is critical between all sitesbull Tower site interconnection (microwave T1
etc) is also critical and can be expensive
28
Simulcast Transmitting Systems
Site 1Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
29
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
Kandiyohi Co MN ndash with Simulcast
30
31
ldquoSimulcastrdquo fills in where single site canrsquot
32
Simulcast Issues
bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality
33
Simulcast Issues
bull Slightly out of phase -ldquoGhostingrdquo on a TV set
bull Out-of-phase signals can cause destructive cancellation
bull Fully in-phase signals produce constructive composite signal
34
Discussion and questions regarding Simulcast transmission
techniques and issues
35
Multicast Transmitting Systems
Multicast Transmitting is defined as bull A radio system where different radio
frequencies are used at each tower site within the radio system
Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost
36
Multicast Transmitting Systems
Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its
own set of frequencies)bull No Simulcast coverage benefits (overlap
voting)bull Units ldquoroamrdquo between sites
37
f1 f2 f3 f4 f5
f6 f7 f8 f9 f10
Kandiyohi Co MN ndash with Multicast
38
ARMER System
In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link
Typical ARMER tower site is Multicast Typical Local Ehancement system is
Simulcast
39
Zone Controller
40
Radio System Modulation Technologies
bull Analog vs DigitalMost existing Public Safety radio
systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why
41
Modulation Techniques
Analog transmission
Digital transmission
Information is sent by changing the frequency amplitude or phase of the radio signal
Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)
42
Modulation Techniques
bull Digital Benefits Clearer audio throughout system coverage
area
Improved radio frequency efficiency
Improved system coverage
Imbedded signaling options
Encryption with no range loss
43
Voting Receiver Technology
In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site
In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip
hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip
hellipwhich may be stronger than the original signal
44
Voting Receiver Systems
Site 1
Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5f1 f2 f3 f4 f5
Comparator
Received audio to System
45
Discussionamp
Questions
Slide Number 1
Presentation Agenda
ldquoTrunking 101rdquo
What is ldquoTrunkingrdquo
Conventional vs Trunked
Slide Number 6
Slide Number 7
Your Bank Tellers ndash as ldquoConventionalrdquo
Conventional vs Trunked
Trunked Radio Systems
Conventional vs Trunked
Conventional vs Trunked
Basic Trunking Diagram
Your Bank Tellers ndash as ldquoTrunkedrdquo
Conventional vs Trunked
So How Does It Work
Control Channel continuously transmits system data to all radios
Radio user presses TX button and radio information is sent via control channel to Central Controller
Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
When transmission is completed all units revert back to Control Channel
Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
Fire amp EMS Talk Groups
Questionshellipso far
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Kandiyohi Co MN ndash with Simulcast
Slide Number 31
Simulcast Issues
Simulcast Issues
Discussion and questions regarding Simulcast transmission techniques and issues
Multicast Transmitting Systems
Multicast Transmitting Systems
Kandiyohi Co MN ndash with Multicast
ARMER System
Slide Number 39
Radio System Modulation Technologies
Modulation Techniques
Modulation Techniques
Voting Receiver Technology
Voting Receiver Systems
DiscussionampQuestions
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
6
TXRX
FD
Fire Channel154235 MhzTX
RX
EMS Channel155340
TXRX
Law Repeater Channel 155625 Mhz
EMS
PD
7
TXRX
FD
Fire Channel154235 Mhz
TXRX
EMS Channel155340
TXRX
Law Repeater Channel 155625 Mhz
EMS
PD1PD2
X
8
Your Bank Tellers ndash as ldquoConventionalrdquo
PD FireEMS PWAdmin
EMS FD
FDPD
PD
Queueby
Account
9
Conventional vs Trunked
Conventional Radio (base or repeater) systembull A Channel = a Frequencybull If a channel is in use radio user must wait in
ldquoqueuerdquo before being able to transmit on the system
bull hellipand a new frequency must be obtained each time another ldquochannelrdquo is needed in the radio system
bull The system is limited by the number of frequencies in the systemhellip
10
Trunked Radio Systems
CentralController
11
Conventional vs Trunked
Trunked Radio (repeater) systembull Uses a group of similar radio frequencies to
create a ldquopoolrdquo for radio system users to accessbull Systems can be built using VHF UHF or 800
Mhzbull A Channel is NOT a Frequencyhellip(generally)bull A Channel (on your radio) is now a computer-
generated codebull hellipand are now referred to as ldquoTalk Groupsrdquo
12
Conventional vs Trunked
Trunked Radio (repeater) systembull The entire system is managed by a computer
often referred to as the ldquoCentral Controllerrdquobull All radios in the system also are computer-
controlled and communicate to the central controller via one frequency known as the ldquoControl Channelrdquo
13
EMS
1 to 28 Channels
CH 1
CentralController
TX RX
CH 2
RXTX
CH 3
RXTX
CH 4
RXTX
CH 28
RXTX
ControlChannel
PD
Basic Trunking Diagram
FD
14
Your Bank Tellers ndash as ldquoTrunkedrdquo
Director CH 5CH 3 CH 4CH 2
EMS FD
PD
PD
Queueby
FirstAvailable
Teller
FD
IN
15
Conventional vs Trunked
Trunked Radio Benefits bull Greatly improved usage of scarce radio
frequenciesbull Greater overall radio system flexibility
includingChannel (Talk Group) capabilitiesVarious user features including Emergency
Alarm PTT ID Channel Regrouping Call Alert and Radio Inhibit
bull Brings radio users together on a common radio system
bull Consistency in radio coverage
16
So How Does It Work
17
Control Channel continuously transmits system data to all radios PD
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FDEMS
18
Radio user presses TX button and radio information is sent via control channel to
Central Controller
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
19
Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios
selected on same Talk Group
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
FD
20
Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the
voice transmission
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
FD
21
When transmission is completed all units revert back to Control Channel
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
FD
22
Radio System Fleetmapping
Radio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo
(Law Enforcement shown here)
1 Itasca Co Law 1 IT Law 1 Y Y 1 22 Itasca Co Law 2 IT Law 2 Y Y 2 23 Itasca Co Law 3 IT Law 3 Y Y 1 34 Itasca Co Law Tac IT Law Tac Y Y 2 35 Itasca Co SO Admin IT SO Adm Y N 1 36 Itasca Co Srch amp Res IT S-R Y N 2 37 Itasca Co Probation IT Prob Y N 1 38 Itasca Co SO Jail IT SO Jail N na na9 Grand Rapids PD GR PD Ops Y Y 2 210 Drug Task Force IT DTF Y N11 Emer Response Team IT ERT Y N
12 Law Scene of Action SOA P1 N N na na
13 Grand Rapids PD Admin GR PD Adm Y N 1 414 Bigfork Police Admin BF PD Adm Y N 2 415 Bovey Police Admin BV PD Adm Y N 1 416 Coleraine Police Admin CL PD Adm Y N 2 417 Deer River Police Admin DR PD Adm Y N 1 418 Keewatin Police Admin KW PD Adm Y N 2 419 Nashwauk Police Admin NW PD Adm Y N 1 4
Talk
grou
p Na
me
Talk
grou
p Al
ias
(ABB
R)
Trun
ked
Disp
atch
Fails
oft
Chan
nel
Talk
grou
p Pr
iorit
y
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
23
Fire amp EMS Talk Groups
Talkg
roup
Na
me
Talkg
roup
Alia
s (A
BBR)
Trun
ked
Disp
atch
Fails
oft
Chan
nel
Talkg
roup
Pr
iority
Itasca Co Fire 1 IT Fire 1 Y Y 3 2Itasca Co Fire 2 IT Fire 2 Y Y 4 2Itasca Co Fire 3 IT Fire 3 Y Y 3 3
Itasca Co Fire Tac IT Fire Tac Y Y 4 4
FireEMS Scene of Action SOAFIRE1 N N na na
Balsam Fire Admin BS FD Adm Y N 3 4Bigfork Fire Admin BF FD Adm Y N 4 4Bovey Fire Admin BV FD Adm Y N 3 4
Calumet Fire Admin CA FD Adm Y N 3 4Cohasset Fire Admin CH FD Adm Y N 4 4Coleraine Fire Admin CL FD Adm Y N 3 4Deer River Fire Admin DR FD Adm Y N 4 4Goodland Fire Admin GL FD Adm Y N 3 4
Grand Rapids Fire Admin GR FD Adm Y N 4 4Keewatin Fire Admin KW FD Adm Y N 3 4Marble Fire Admin MB FD Adm Y N 4 4
Nashwauk Fire Admin NW FD Adm Y N 3 4Squaw Lake Fire Admin SQ FD Adm Y N 4 4
Taconite Fire Admin TC FD Adm Y N 3 4WarbaFeelySago Fire Admin WFS FD Adm Y N 4 4
Fire VHF Mu Aid FD Muaid Y Y 3 3Itasca Co EMS 1 IT EMS (AMB) 1 Y Y 5 2Itasca Co EMS 2 IT EMS (AMB) 2 Y Y 6 2
Itasca Co EMS Tac IT EMS (AMB) Tac Y Y 3
FireEMS Scene of Action SOAFIRE2 N N na na
Bigfork Ambulance Admin BF AMB Adm Y N 5Buck Lake 1st Responders BL 1st AdmDeer River Ambulance Admin DR AMB Adm Y N 6
Meds1 Ambulance Admin M1 AMB Adm Y N 5Naswauk Ambulance Admin NW AMB Adm
Squaw Lake 1st Resp Admin SQ 1st Adm Y N 6
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
24
Questionshellipso far
25
Simulcast Transmitting Systems
Simulcast Transmitting is defined as bull A radio system where the same radio
frequencies are Simultaneously Broadcast from all tower sites within the radio system
bull This allows same radio frequencies to be used throughout the entire coverage area
26
Simulcast Transmitting Systems
Simulcast Benefitsbull Seamless communications throughout the radio
systemrsquos coverage areabull Improved radio frequency utilizationbull Improved coverage in areas with difficult
terrainbull Improved in-building coverage (signals in
overlap zones are ldquoadditiverdquo)
27
Simulcast Transmitting Systems
Simulcast ldquoconsrdquo bull Not inexpensive technologybull Tower site spacing is critical (especially when
using NPSPAC frequencies)bull Signal ldquotimingrdquo is critical between all sitesbull Tower site interconnection (microwave T1
etc) is also critical and can be expensive
28
Simulcast Transmitting Systems
Site 1Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
29
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
Kandiyohi Co MN ndash with Simulcast
30
31
ldquoSimulcastrdquo fills in where single site canrsquot
32
Simulcast Issues
bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality
33
Simulcast Issues
bull Slightly out of phase -ldquoGhostingrdquo on a TV set
bull Out-of-phase signals can cause destructive cancellation
bull Fully in-phase signals produce constructive composite signal
34
Discussion and questions regarding Simulcast transmission
techniques and issues
35
Multicast Transmitting Systems
Multicast Transmitting is defined as bull A radio system where different radio
frequencies are used at each tower site within the radio system
Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost
36
Multicast Transmitting Systems
Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its
own set of frequencies)bull No Simulcast coverage benefits (overlap
voting)bull Units ldquoroamrdquo between sites
37
f1 f2 f3 f4 f5
f6 f7 f8 f9 f10
Kandiyohi Co MN ndash with Multicast
38
ARMER System
In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link
Typical ARMER tower site is Multicast Typical Local Ehancement system is
Simulcast
39
Zone Controller
40
Radio System Modulation Technologies
bull Analog vs DigitalMost existing Public Safety radio
systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why
41
Modulation Techniques
Analog transmission
Digital transmission
Information is sent by changing the frequency amplitude or phase of the radio signal
Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)
42
Modulation Techniques
bull Digital Benefits Clearer audio throughout system coverage
area
Improved radio frequency efficiency
Improved system coverage
Imbedded signaling options
Encryption with no range loss
43
Voting Receiver Technology
In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site
In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip
hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip
hellipwhich may be stronger than the original signal
44
Voting Receiver Systems
Site 1
Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5f1 f2 f3 f4 f5
Comparator
Received audio to System
45
Discussionamp
Questions
Slide Number 1
Presentation Agenda
ldquoTrunking 101rdquo
What is ldquoTrunkingrdquo
Conventional vs Trunked
Slide Number 6
Slide Number 7
Your Bank Tellers ndash as ldquoConventionalrdquo
Conventional vs Trunked
Trunked Radio Systems
Conventional vs Trunked
Conventional vs Trunked
Basic Trunking Diagram
Your Bank Tellers ndash as ldquoTrunkedrdquo
Conventional vs Trunked
So How Does It Work
Control Channel continuously transmits system data to all radios
Radio user presses TX button and radio information is sent via control channel to Central Controller
Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
When transmission is completed all units revert back to Control Channel
Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
Fire amp EMS Talk Groups
Questionshellipso far
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Kandiyohi Co MN ndash with Simulcast
Slide Number 31
Simulcast Issues
Simulcast Issues
Discussion and questions regarding Simulcast transmission techniques and issues
Multicast Transmitting Systems
Multicast Transmitting Systems
Kandiyohi Co MN ndash with Multicast
ARMER System
Slide Number 39
Radio System Modulation Technologies
Modulation Techniques
Modulation Techniques
Voting Receiver Technology
Voting Receiver Systems
DiscussionampQuestions
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
7
TXRX
FD
Fire Channel154235 Mhz
TXRX
EMS Channel155340
TXRX
Law Repeater Channel 155625 Mhz
EMS
PD1PD2
X
8
Your Bank Tellers ndash as ldquoConventionalrdquo
PD FireEMS PWAdmin
EMS FD
FDPD
PD
Queueby
Account
9
Conventional vs Trunked
Conventional Radio (base or repeater) systembull A Channel = a Frequencybull If a channel is in use radio user must wait in
ldquoqueuerdquo before being able to transmit on the system
bull hellipand a new frequency must be obtained each time another ldquochannelrdquo is needed in the radio system
bull The system is limited by the number of frequencies in the systemhellip
10
Trunked Radio Systems
CentralController
11
Conventional vs Trunked
Trunked Radio (repeater) systembull Uses a group of similar radio frequencies to
create a ldquopoolrdquo for radio system users to accessbull Systems can be built using VHF UHF or 800
Mhzbull A Channel is NOT a Frequencyhellip(generally)bull A Channel (on your radio) is now a computer-
generated codebull hellipand are now referred to as ldquoTalk Groupsrdquo
12
Conventional vs Trunked
Trunked Radio (repeater) systembull The entire system is managed by a computer
often referred to as the ldquoCentral Controllerrdquobull All radios in the system also are computer-
controlled and communicate to the central controller via one frequency known as the ldquoControl Channelrdquo
13
EMS
1 to 28 Channels
CH 1
CentralController
TX RX
CH 2
RXTX
CH 3
RXTX
CH 4
RXTX
CH 28
RXTX
ControlChannel
PD
Basic Trunking Diagram
FD
14
Your Bank Tellers ndash as ldquoTrunkedrdquo
Director CH 5CH 3 CH 4CH 2
EMS FD
PD
PD
Queueby
FirstAvailable
Teller
FD
IN
15
Conventional vs Trunked
Trunked Radio Benefits bull Greatly improved usage of scarce radio
frequenciesbull Greater overall radio system flexibility
includingChannel (Talk Group) capabilitiesVarious user features including Emergency
Alarm PTT ID Channel Regrouping Call Alert and Radio Inhibit
bull Brings radio users together on a common radio system
bull Consistency in radio coverage
16
So How Does It Work
17
Control Channel continuously transmits system data to all radios PD
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FDEMS
18
Radio user presses TX button and radio information is sent via control channel to
Central Controller
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
19
Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios
selected on same Talk Group
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
FD
20
Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the
voice transmission
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
FD
21
When transmission is completed all units revert back to Control Channel
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
FD
22
Radio System Fleetmapping
Radio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo
(Law Enforcement shown here)
1 Itasca Co Law 1 IT Law 1 Y Y 1 22 Itasca Co Law 2 IT Law 2 Y Y 2 23 Itasca Co Law 3 IT Law 3 Y Y 1 34 Itasca Co Law Tac IT Law Tac Y Y 2 35 Itasca Co SO Admin IT SO Adm Y N 1 36 Itasca Co Srch amp Res IT S-R Y N 2 37 Itasca Co Probation IT Prob Y N 1 38 Itasca Co SO Jail IT SO Jail N na na9 Grand Rapids PD GR PD Ops Y Y 2 210 Drug Task Force IT DTF Y N11 Emer Response Team IT ERT Y N
12 Law Scene of Action SOA P1 N N na na
13 Grand Rapids PD Admin GR PD Adm Y N 1 414 Bigfork Police Admin BF PD Adm Y N 2 415 Bovey Police Admin BV PD Adm Y N 1 416 Coleraine Police Admin CL PD Adm Y N 2 417 Deer River Police Admin DR PD Adm Y N 1 418 Keewatin Police Admin KW PD Adm Y N 2 419 Nashwauk Police Admin NW PD Adm Y N 1 4
Talk
grou
p Na
me
Talk
grou
p Al
ias
(ABB
R)
Trun
ked
Disp
atch
Fails
oft
Chan
nel
Talk
grou
p Pr
iorit
y
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
23
Fire amp EMS Talk Groups
Talkg
roup
Na
me
Talkg
roup
Alia
s (A
BBR)
Trun
ked
Disp
atch
Fails
oft
Chan
nel
Talkg
roup
Pr
iority
Itasca Co Fire 1 IT Fire 1 Y Y 3 2Itasca Co Fire 2 IT Fire 2 Y Y 4 2Itasca Co Fire 3 IT Fire 3 Y Y 3 3
Itasca Co Fire Tac IT Fire Tac Y Y 4 4
FireEMS Scene of Action SOAFIRE1 N N na na
Balsam Fire Admin BS FD Adm Y N 3 4Bigfork Fire Admin BF FD Adm Y N 4 4Bovey Fire Admin BV FD Adm Y N 3 4
Calumet Fire Admin CA FD Adm Y N 3 4Cohasset Fire Admin CH FD Adm Y N 4 4Coleraine Fire Admin CL FD Adm Y N 3 4Deer River Fire Admin DR FD Adm Y N 4 4Goodland Fire Admin GL FD Adm Y N 3 4
Grand Rapids Fire Admin GR FD Adm Y N 4 4Keewatin Fire Admin KW FD Adm Y N 3 4Marble Fire Admin MB FD Adm Y N 4 4
Nashwauk Fire Admin NW FD Adm Y N 3 4Squaw Lake Fire Admin SQ FD Adm Y N 4 4
Taconite Fire Admin TC FD Adm Y N 3 4WarbaFeelySago Fire Admin WFS FD Adm Y N 4 4
Fire VHF Mu Aid FD Muaid Y Y 3 3Itasca Co EMS 1 IT EMS (AMB) 1 Y Y 5 2Itasca Co EMS 2 IT EMS (AMB) 2 Y Y 6 2
Itasca Co EMS Tac IT EMS (AMB) Tac Y Y 3
FireEMS Scene of Action SOAFIRE2 N N na na
Bigfork Ambulance Admin BF AMB Adm Y N 5Buck Lake 1st Responders BL 1st AdmDeer River Ambulance Admin DR AMB Adm Y N 6
Meds1 Ambulance Admin M1 AMB Adm Y N 5Naswauk Ambulance Admin NW AMB Adm
Squaw Lake 1st Resp Admin SQ 1st Adm Y N 6
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
24
Questionshellipso far
25
Simulcast Transmitting Systems
Simulcast Transmitting is defined as bull A radio system where the same radio
frequencies are Simultaneously Broadcast from all tower sites within the radio system
bull This allows same radio frequencies to be used throughout the entire coverage area
26
Simulcast Transmitting Systems
Simulcast Benefitsbull Seamless communications throughout the radio
systemrsquos coverage areabull Improved radio frequency utilizationbull Improved coverage in areas with difficult
terrainbull Improved in-building coverage (signals in
overlap zones are ldquoadditiverdquo)
27
Simulcast Transmitting Systems
Simulcast ldquoconsrdquo bull Not inexpensive technologybull Tower site spacing is critical (especially when
using NPSPAC frequencies)bull Signal ldquotimingrdquo is critical between all sitesbull Tower site interconnection (microwave T1
etc) is also critical and can be expensive
28
Simulcast Transmitting Systems
Site 1Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
29
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
Kandiyohi Co MN ndash with Simulcast
30
31
ldquoSimulcastrdquo fills in where single site canrsquot
32
Simulcast Issues
bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality
33
Simulcast Issues
bull Slightly out of phase -ldquoGhostingrdquo on a TV set
bull Out-of-phase signals can cause destructive cancellation
bull Fully in-phase signals produce constructive composite signal
34
Discussion and questions regarding Simulcast transmission
techniques and issues
35
Multicast Transmitting Systems
Multicast Transmitting is defined as bull A radio system where different radio
frequencies are used at each tower site within the radio system
Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost
36
Multicast Transmitting Systems
Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its
own set of frequencies)bull No Simulcast coverage benefits (overlap
voting)bull Units ldquoroamrdquo between sites
37
f1 f2 f3 f4 f5
f6 f7 f8 f9 f10
Kandiyohi Co MN ndash with Multicast
38
ARMER System
In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link
Typical ARMER tower site is Multicast Typical Local Ehancement system is
Simulcast
39
Zone Controller
40
Radio System Modulation Technologies
bull Analog vs DigitalMost existing Public Safety radio
systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why
41
Modulation Techniques
Analog transmission
Digital transmission
Information is sent by changing the frequency amplitude or phase of the radio signal
Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)
42
Modulation Techniques
bull Digital Benefits Clearer audio throughout system coverage
area
Improved radio frequency efficiency
Improved system coverage
Imbedded signaling options
Encryption with no range loss
43
Voting Receiver Technology
In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site
In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip
hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip
hellipwhich may be stronger than the original signal
44
Voting Receiver Systems
Site 1
Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5f1 f2 f3 f4 f5
Comparator
Received audio to System
45
Discussionamp
Questions
Slide Number 1
Presentation Agenda
ldquoTrunking 101rdquo
What is ldquoTrunkingrdquo
Conventional vs Trunked
Slide Number 6
Slide Number 7
Your Bank Tellers ndash as ldquoConventionalrdquo
Conventional vs Trunked
Trunked Radio Systems
Conventional vs Trunked
Conventional vs Trunked
Basic Trunking Diagram
Your Bank Tellers ndash as ldquoTrunkedrdquo
Conventional vs Trunked
So How Does It Work
Control Channel continuously transmits system data to all radios
Radio user presses TX button and radio information is sent via control channel to Central Controller
Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
When transmission is completed all units revert back to Control Channel
Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
Fire amp EMS Talk Groups
Questionshellipso far
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Kandiyohi Co MN ndash with Simulcast
Slide Number 31
Simulcast Issues
Simulcast Issues
Discussion and questions regarding Simulcast transmission techniques and issues
Multicast Transmitting Systems
Multicast Transmitting Systems
Kandiyohi Co MN ndash with Multicast
ARMER System
Slide Number 39
Radio System Modulation Technologies
Modulation Techniques
Modulation Techniques
Voting Receiver Technology
Voting Receiver Systems
DiscussionampQuestions
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
8
Your Bank Tellers ndash as ldquoConventionalrdquo
PD FireEMS PWAdmin
EMS FD
FDPD
PD
Queueby
Account
9
Conventional vs Trunked
Conventional Radio (base or repeater) systembull A Channel = a Frequencybull If a channel is in use radio user must wait in
ldquoqueuerdquo before being able to transmit on the system
bull hellipand a new frequency must be obtained each time another ldquochannelrdquo is needed in the radio system
bull The system is limited by the number of frequencies in the systemhellip
10
Trunked Radio Systems
CentralController
11
Conventional vs Trunked
Trunked Radio (repeater) systembull Uses a group of similar radio frequencies to
create a ldquopoolrdquo for radio system users to accessbull Systems can be built using VHF UHF or 800
Mhzbull A Channel is NOT a Frequencyhellip(generally)bull A Channel (on your radio) is now a computer-
generated codebull hellipand are now referred to as ldquoTalk Groupsrdquo
12
Conventional vs Trunked
Trunked Radio (repeater) systembull The entire system is managed by a computer
often referred to as the ldquoCentral Controllerrdquobull All radios in the system also are computer-
controlled and communicate to the central controller via one frequency known as the ldquoControl Channelrdquo
13
EMS
1 to 28 Channels
CH 1
CentralController
TX RX
CH 2
RXTX
CH 3
RXTX
CH 4
RXTX
CH 28
RXTX
ControlChannel
PD
Basic Trunking Diagram
FD
14
Your Bank Tellers ndash as ldquoTrunkedrdquo
Director CH 5CH 3 CH 4CH 2
EMS FD
PD
PD
Queueby
FirstAvailable
Teller
FD
IN
15
Conventional vs Trunked
Trunked Radio Benefits bull Greatly improved usage of scarce radio
frequenciesbull Greater overall radio system flexibility
includingChannel (Talk Group) capabilitiesVarious user features including Emergency
Alarm PTT ID Channel Regrouping Call Alert and Radio Inhibit
bull Brings radio users together on a common radio system
bull Consistency in radio coverage
16
So How Does It Work
17
Control Channel continuously transmits system data to all radios PD
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FDEMS
18
Radio user presses TX button and radio information is sent via control channel to
Central Controller
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
19
Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios
selected on same Talk Group
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
FD
20
Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the
voice transmission
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
FD
21
When transmission is completed all units revert back to Control Channel
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
FD
22
Radio System Fleetmapping
Radio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo
(Law Enforcement shown here)
1 Itasca Co Law 1 IT Law 1 Y Y 1 22 Itasca Co Law 2 IT Law 2 Y Y 2 23 Itasca Co Law 3 IT Law 3 Y Y 1 34 Itasca Co Law Tac IT Law Tac Y Y 2 35 Itasca Co SO Admin IT SO Adm Y N 1 36 Itasca Co Srch amp Res IT S-R Y N 2 37 Itasca Co Probation IT Prob Y N 1 38 Itasca Co SO Jail IT SO Jail N na na9 Grand Rapids PD GR PD Ops Y Y 2 210 Drug Task Force IT DTF Y N11 Emer Response Team IT ERT Y N
12 Law Scene of Action SOA P1 N N na na
13 Grand Rapids PD Admin GR PD Adm Y N 1 414 Bigfork Police Admin BF PD Adm Y N 2 415 Bovey Police Admin BV PD Adm Y N 1 416 Coleraine Police Admin CL PD Adm Y N 2 417 Deer River Police Admin DR PD Adm Y N 1 418 Keewatin Police Admin KW PD Adm Y N 2 419 Nashwauk Police Admin NW PD Adm Y N 1 4
Talk
grou
p Na
me
Talk
grou
p Al
ias
(ABB
R)
Trun
ked
Disp
atch
Fails
oft
Chan
nel
Talk
grou
p Pr
iorit
y
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
23
Fire amp EMS Talk Groups
Talkg
roup
Na
me
Talkg
roup
Alia
s (A
BBR)
Trun
ked
Disp
atch
Fails
oft
Chan
nel
Talkg
roup
Pr
iority
Itasca Co Fire 1 IT Fire 1 Y Y 3 2Itasca Co Fire 2 IT Fire 2 Y Y 4 2Itasca Co Fire 3 IT Fire 3 Y Y 3 3
Itasca Co Fire Tac IT Fire Tac Y Y 4 4
FireEMS Scene of Action SOAFIRE1 N N na na
Balsam Fire Admin BS FD Adm Y N 3 4Bigfork Fire Admin BF FD Adm Y N 4 4Bovey Fire Admin BV FD Adm Y N 3 4
Calumet Fire Admin CA FD Adm Y N 3 4Cohasset Fire Admin CH FD Adm Y N 4 4Coleraine Fire Admin CL FD Adm Y N 3 4Deer River Fire Admin DR FD Adm Y N 4 4Goodland Fire Admin GL FD Adm Y N 3 4
Grand Rapids Fire Admin GR FD Adm Y N 4 4Keewatin Fire Admin KW FD Adm Y N 3 4Marble Fire Admin MB FD Adm Y N 4 4
Nashwauk Fire Admin NW FD Adm Y N 3 4Squaw Lake Fire Admin SQ FD Adm Y N 4 4
Taconite Fire Admin TC FD Adm Y N 3 4WarbaFeelySago Fire Admin WFS FD Adm Y N 4 4
Fire VHF Mu Aid FD Muaid Y Y 3 3Itasca Co EMS 1 IT EMS (AMB) 1 Y Y 5 2Itasca Co EMS 2 IT EMS (AMB) 2 Y Y 6 2
Itasca Co EMS Tac IT EMS (AMB) Tac Y Y 3
FireEMS Scene of Action SOAFIRE2 N N na na
Bigfork Ambulance Admin BF AMB Adm Y N 5Buck Lake 1st Responders BL 1st AdmDeer River Ambulance Admin DR AMB Adm Y N 6
Meds1 Ambulance Admin M1 AMB Adm Y N 5Naswauk Ambulance Admin NW AMB Adm
Squaw Lake 1st Resp Admin SQ 1st Adm Y N 6
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
24
Questionshellipso far
25
Simulcast Transmitting Systems
Simulcast Transmitting is defined as bull A radio system where the same radio
frequencies are Simultaneously Broadcast from all tower sites within the radio system
bull This allows same radio frequencies to be used throughout the entire coverage area
26
Simulcast Transmitting Systems
Simulcast Benefitsbull Seamless communications throughout the radio
systemrsquos coverage areabull Improved radio frequency utilizationbull Improved coverage in areas with difficult
terrainbull Improved in-building coverage (signals in
overlap zones are ldquoadditiverdquo)
27
Simulcast Transmitting Systems
Simulcast ldquoconsrdquo bull Not inexpensive technologybull Tower site spacing is critical (especially when
using NPSPAC frequencies)bull Signal ldquotimingrdquo is critical between all sitesbull Tower site interconnection (microwave T1
etc) is also critical and can be expensive
28
Simulcast Transmitting Systems
Site 1Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
29
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
Kandiyohi Co MN ndash with Simulcast
30
31
ldquoSimulcastrdquo fills in where single site canrsquot
32
Simulcast Issues
bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality
33
Simulcast Issues
bull Slightly out of phase -ldquoGhostingrdquo on a TV set
bull Out-of-phase signals can cause destructive cancellation
bull Fully in-phase signals produce constructive composite signal
34
Discussion and questions regarding Simulcast transmission
techniques and issues
35
Multicast Transmitting Systems
Multicast Transmitting is defined as bull A radio system where different radio
frequencies are used at each tower site within the radio system
Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost
36
Multicast Transmitting Systems
Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its
own set of frequencies)bull No Simulcast coverage benefits (overlap
voting)bull Units ldquoroamrdquo between sites
37
f1 f2 f3 f4 f5
f6 f7 f8 f9 f10
Kandiyohi Co MN ndash with Multicast
38
ARMER System
In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link
Typical ARMER tower site is Multicast Typical Local Ehancement system is
Simulcast
39
Zone Controller
40
Radio System Modulation Technologies
bull Analog vs DigitalMost existing Public Safety radio
systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why
41
Modulation Techniques
Analog transmission
Digital transmission
Information is sent by changing the frequency amplitude or phase of the radio signal
Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)
42
Modulation Techniques
bull Digital Benefits Clearer audio throughout system coverage
area
Improved radio frequency efficiency
Improved system coverage
Imbedded signaling options
Encryption with no range loss
43
Voting Receiver Technology
In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site
In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip
hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip
hellipwhich may be stronger than the original signal
44
Voting Receiver Systems
Site 1
Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5f1 f2 f3 f4 f5
Comparator
Received audio to System
45
Discussionamp
Questions
Slide Number 1
Presentation Agenda
ldquoTrunking 101rdquo
What is ldquoTrunkingrdquo
Conventional vs Trunked
Slide Number 6
Slide Number 7
Your Bank Tellers ndash as ldquoConventionalrdquo
Conventional vs Trunked
Trunked Radio Systems
Conventional vs Trunked
Conventional vs Trunked
Basic Trunking Diagram
Your Bank Tellers ndash as ldquoTrunkedrdquo
Conventional vs Trunked
So How Does It Work
Control Channel continuously transmits system data to all radios
Radio user presses TX button and radio information is sent via control channel to Central Controller
Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
When transmission is completed all units revert back to Control Channel
Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
Fire amp EMS Talk Groups
Questionshellipso far
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Kandiyohi Co MN ndash with Simulcast
Slide Number 31
Simulcast Issues
Simulcast Issues
Discussion and questions regarding Simulcast transmission techniques and issues
Multicast Transmitting Systems
Multicast Transmitting Systems
Kandiyohi Co MN ndash with Multicast
ARMER System
Slide Number 39
Radio System Modulation Technologies
Modulation Techniques
Modulation Techniques
Voting Receiver Technology
Voting Receiver Systems
DiscussionampQuestions
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
9
Conventional vs Trunked
Conventional Radio (base or repeater) systembull A Channel = a Frequencybull If a channel is in use radio user must wait in
ldquoqueuerdquo before being able to transmit on the system
bull hellipand a new frequency must be obtained each time another ldquochannelrdquo is needed in the radio system
bull The system is limited by the number of frequencies in the systemhellip
10
Trunked Radio Systems
CentralController
11
Conventional vs Trunked
Trunked Radio (repeater) systembull Uses a group of similar radio frequencies to
create a ldquopoolrdquo for radio system users to accessbull Systems can be built using VHF UHF or 800
Mhzbull A Channel is NOT a Frequencyhellip(generally)bull A Channel (on your radio) is now a computer-
generated codebull hellipand are now referred to as ldquoTalk Groupsrdquo
12
Conventional vs Trunked
Trunked Radio (repeater) systembull The entire system is managed by a computer
often referred to as the ldquoCentral Controllerrdquobull All radios in the system also are computer-
controlled and communicate to the central controller via one frequency known as the ldquoControl Channelrdquo
13
EMS
1 to 28 Channels
CH 1
CentralController
TX RX
CH 2
RXTX
CH 3
RXTX
CH 4
RXTX
CH 28
RXTX
ControlChannel
PD
Basic Trunking Diagram
FD
14
Your Bank Tellers ndash as ldquoTrunkedrdquo
Director CH 5CH 3 CH 4CH 2
EMS FD
PD
PD
Queueby
FirstAvailable
Teller
FD
IN
15
Conventional vs Trunked
Trunked Radio Benefits bull Greatly improved usage of scarce radio
frequenciesbull Greater overall radio system flexibility
includingChannel (Talk Group) capabilitiesVarious user features including Emergency
Alarm PTT ID Channel Regrouping Call Alert and Radio Inhibit
bull Brings radio users together on a common radio system
bull Consistency in radio coverage
16
So How Does It Work
17
Control Channel continuously transmits system data to all radios PD
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FDEMS
18
Radio user presses TX button and radio information is sent via control channel to
Central Controller
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
19
Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios
selected on same Talk Group
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
FD
20
Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the
voice transmission
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
FD
21
When transmission is completed all units revert back to Control Channel
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
FD
22
Radio System Fleetmapping
Radio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo
(Law Enforcement shown here)
1 Itasca Co Law 1 IT Law 1 Y Y 1 22 Itasca Co Law 2 IT Law 2 Y Y 2 23 Itasca Co Law 3 IT Law 3 Y Y 1 34 Itasca Co Law Tac IT Law Tac Y Y 2 35 Itasca Co SO Admin IT SO Adm Y N 1 36 Itasca Co Srch amp Res IT S-R Y N 2 37 Itasca Co Probation IT Prob Y N 1 38 Itasca Co SO Jail IT SO Jail N na na9 Grand Rapids PD GR PD Ops Y Y 2 210 Drug Task Force IT DTF Y N11 Emer Response Team IT ERT Y N
12 Law Scene of Action SOA P1 N N na na
13 Grand Rapids PD Admin GR PD Adm Y N 1 414 Bigfork Police Admin BF PD Adm Y N 2 415 Bovey Police Admin BV PD Adm Y N 1 416 Coleraine Police Admin CL PD Adm Y N 2 417 Deer River Police Admin DR PD Adm Y N 1 418 Keewatin Police Admin KW PD Adm Y N 2 419 Nashwauk Police Admin NW PD Adm Y N 1 4
Talk
grou
p Na
me
Talk
grou
p Al
ias
(ABB
R)
Trun
ked
Disp
atch
Fails
oft
Chan
nel
Talk
grou
p Pr
iorit
y
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
23
Fire amp EMS Talk Groups
Talkg
roup
Na
me
Talkg
roup
Alia
s (A
BBR)
Trun
ked
Disp
atch
Fails
oft
Chan
nel
Talkg
roup
Pr
iority
Itasca Co Fire 1 IT Fire 1 Y Y 3 2Itasca Co Fire 2 IT Fire 2 Y Y 4 2Itasca Co Fire 3 IT Fire 3 Y Y 3 3
Itasca Co Fire Tac IT Fire Tac Y Y 4 4
FireEMS Scene of Action SOAFIRE1 N N na na
Balsam Fire Admin BS FD Adm Y N 3 4Bigfork Fire Admin BF FD Adm Y N 4 4Bovey Fire Admin BV FD Adm Y N 3 4
Calumet Fire Admin CA FD Adm Y N 3 4Cohasset Fire Admin CH FD Adm Y N 4 4Coleraine Fire Admin CL FD Adm Y N 3 4Deer River Fire Admin DR FD Adm Y N 4 4Goodland Fire Admin GL FD Adm Y N 3 4
Grand Rapids Fire Admin GR FD Adm Y N 4 4Keewatin Fire Admin KW FD Adm Y N 3 4Marble Fire Admin MB FD Adm Y N 4 4
Nashwauk Fire Admin NW FD Adm Y N 3 4Squaw Lake Fire Admin SQ FD Adm Y N 4 4
Taconite Fire Admin TC FD Adm Y N 3 4WarbaFeelySago Fire Admin WFS FD Adm Y N 4 4
Fire VHF Mu Aid FD Muaid Y Y 3 3Itasca Co EMS 1 IT EMS (AMB) 1 Y Y 5 2Itasca Co EMS 2 IT EMS (AMB) 2 Y Y 6 2
Itasca Co EMS Tac IT EMS (AMB) Tac Y Y 3
FireEMS Scene of Action SOAFIRE2 N N na na
Bigfork Ambulance Admin BF AMB Adm Y N 5Buck Lake 1st Responders BL 1st AdmDeer River Ambulance Admin DR AMB Adm Y N 6
Meds1 Ambulance Admin M1 AMB Adm Y N 5Naswauk Ambulance Admin NW AMB Adm
Squaw Lake 1st Resp Admin SQ 1st Adm Y N 6
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
24
Questionshellipso far
25
Simulcast Transmitting Systems
Simulcast Transmitting is defined as bull A radio system where the same radio
frequencies are Simultaneously Broadcast from all tower sites within the radio system
bull This allows same radio frequencies to be used throughout the entire coverage area
26
Simulcast Transmitting Systems
Simulcast Benefitsbull Seamless communications throughout the radio
systemrsquos coverage areabull Improved radio frequency utilizationbull Improved coverage in areas with difficult
terrainbull Improved in-building coverage (signals in
overlap zones are ldquoadditiverdquo)
27
Simulcast Transmitting Systems
Simulcast ldquoconsrdquo bull Not inexpensive technologybull Tower site spacing is critical (especially when
using NPSPAC frequencies)bull Signal ldquotimingrdquo is critical between all sitesbull Tower site interconnection (microwave T1
etc) is also critical and can be expensive
28
Simulcast Transmitting Systems
Site 1Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
29
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
Kandiyohi Co MN ndash with Simulcast
30
31
ldquoSimulcastrdquo fills in where single site canrsquot
32
Simulcast Issues
bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality
33
Simulcast Issues
bull Slightly out of phase -ldquoGhostingrdquo on a TV set
bull Out-of-phase signals can cause destructive cancellation
bull Fully in-phase signals produce constructive composite signal
34
Discussion and questions regarding Simulcast transmission
techniques and issues
35
Multicast Transmitting Systems
Multicast Transmitting is defined as bull A radio system where different radio
frequencies are used at each tower site within the radio system
Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost
36
Multicast Transmitting Systems
Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its
own set of frequencies)bull No Simulcast coverage benefits (overlap
voting)bull Units ldquoroamrdquo between sites
37
f1 f2 f3 f4 f5
f6 f7 f8 f9 f10
Kandiyohi Co MN ndash with Multicast
38
ARMER System
In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link
Typical ARMER tower site is Multicast Typical Local Ehancement system is
Simulcast
39
Zone Controller
40
Radio System Modulation Technologies
bull Analog vs DigitalMost existing Public Safety radio
systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why
41
Modulation Techniques
Analog transmission
Digital transmission
Information is sent by changing the frequency amplitude or phase of the radio signal
Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)
42
Modulation Techniques
bull Digital Benefits Clearer audio throughout system coverage
area
Improved radio frequency efficiency
Improved system coverage
Imbedded signaling options
Encryption with no range loss
43
Voting Receiver Technology
In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site
In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip
hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip
hellipwhich may be stronger than the original signal
44
Voting Receiver Systems
Site 1
Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5f1 f2 f3 f4 f5
Comparator
Received audio to System
45
Discussionamp
Questions
Slide Number 1
Presentation Agenda
ldquoTrunking 101rdquo
What is ldquoTrunkingrdquo
Conventional vs Trunked
Slide Number 6
Slide Number 7
Your Bank Tellers ndash as ldquoConventionalrdquo
Conventional vs Trunked
Trunked Radio Systems
Conventional vs Trunked
Conventional vs Trunked
Basic Trunking Diagram
Your Bank Tellers ndash as ldquoTrunkedrdquo
Conventional vs Trunked
So How Does It Work
Control Channel continuously transmits system data to all radios
Radio user presses TX button and radio information is sent via control channel to Central Controller
Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
When transmission is completed all units revert back to Control Channel
Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
Fire amp EMS Talk Groups
Questionshellipso far
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Kandiyohi Co MN ndash with Simulcast
Slide Number 31
Simulcast Issues
Simulcast Issues
Discussion and questions regarding Simulcast transmission techniques and issues
Multicast Transmitting Systems
Multicast Transmitting Systems
Kandiyohi Co MN ndash with Multicast
ARMER System
Slide Number 39
Radio System Modulation Technologies
Modulation Techniques
Modulation Techniques
Voting Receiver Technology
Voting Receiver Systems
DiscussionampQuestions
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
10
Trunked Radio Systems
CentralController
11
Conventional vs Trunked
Trunked Radio (repeater) systembull Uses a group of similar radio frequencies to
create a ldquopoolrdquo for radio system users to accessbull Systems can be built using VHF UHF or 800
Mhzbull A Channel is NOT a Frequencyhellip(generally)bull A Channel (on your radio) is now a computer-
generated codebull hellipand are now referred to as ldquoTalk Groupsrdquo
12
Conventional vs Trunked
Trunked Radio (repeater) systembull The entire system is managed by a computer
often referred to as the ldquoCentral Controllerrdquobull All radios in the system also are computer-
controlled and communicate to the central controller via one frequency known as the ldquoControl Channelrdquo
13
EMS
1 to 28 Channels
CH 1
CentralController
TX RX
CH 2
RXTX
CH 3
RXTX
CH 4
RXTX
CH 28
RXTX
ControlChannel
PD
Basic Trunking Diagram
FD
14
Your Bank Tellers ndash as ldquoTrunkedrdquo
Director CH 5CH 3 CH 4CH 2
EMS FD
PD
PD
Queueby
FirstAvailable
Teller
FD
IN
15
Conventional vs Trunked
Trunked Radio Benefits bull Greatly improved usage of scarce radio
frequenciesbull Greater overall radio system flexibility
includingChannel (Talk Group) capabilitiesVarious user features including Emergency
Alarm PTT ID Channel Regrouping Call Alert and Radio Inhibit
bull Brings radio users together on a common radio system
bull Consistency in radio coverage
16
So How Does It Work
17
Control Channel continuously transmits system data to all radios PD
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FDEMS
18
Radio user presses TX button and radio information is sent via control channel to
Central Controller
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
19
Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios
selected on same Talk Group
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
FD
20
Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the
voice transmission
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
FD
21
When transmission is completed all units revert back to Control Channel
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
FD
22
Radio System Fleetmapping
Radio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo
(Law Enforcement shown here)
1 Itasca Co Law 1 IT Law 1 Y Y 1 22 Itasca Co Law 2 IT Law 2 Y Y 2 23 Itasca Co Law 3 IT Law 3 Y Y 1 34 Itasca Co Law Tac IT Law Tac Y Y 2 35 Itasca Co SO Admin IT SO Adm Y N 1 36 Itasca Co Srch amp Res IT S-R Y N 2 37 Itasca Co Probation IT Prob Y N 1 38 Itasca Co SO Jail IT SO Jail N na na9 Grand Rapids PD GR PD Ops Y Y 2 210 Drug Task Force IT DTF Y N11 Emer Response Team IT ERT Y N
12 Law Scene of Action SOA P1 N N na na
13 Grand Rapids PD Admin GR PD Adm Y N 1 414 Bigfork Police Admin BF PD Adm Y N 2 415 Bovey Police Admin BV PD Adm Y N 1 416 Coleraine Police Admin CL PD Adm Y N 2 417 Deer River Police Admin DR PD Adm Y N 1 418 Keewatin Police Admin KW PD Adm Y N 2 419 Nashwauk Police Admin NW PD Adm Y N 1 4
Talk
grou
p Na
me
Talk
grou
p Al
ias
(ABB
R)
Trun
ked
Disp
atch
Fails
oft
Chan
nel
Talk
grou
p Pr
iorit
y
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
23
Fire amp EMS Talk Groups
Talkg
roup
Na
me
Talkg
roup
Alia
s (A
BBR)
Trun
ked
Disp
atch
Fails
oft
Chan
nel
Talkg
roup
Pr
iority
Itasca Co Fire 1 IT Fire 1 Y Y 3 2Itasca Co Fire 2 IT Fire 2 Y Y 4 2Itasca Co Fire 3 IT Fire 3 Y Y 3 3
Itasca Co Fire Tac IT Fire Tac Y Y 4 4
FireEMS Scene of Action SOAFIRE1 N N na na
Balsam Fire Admin BS FD Adm Y N 3 4Bigfork Fire Admin BF FD Adm Y N 4 4Bovey Fire Admin BV FD Adm Y N 3 4
Calumet Fire Admin CA FD Adm Y N 3 4Cohasset Fire Admin CH FD Adm Y N 4 4Coleraine Fire Admin CL FD Adm Y N 3 4Deer River Fire Admin DR FD Adm Y N 4 4Goodland Fire Admin GL FD Adm Y N 3 4
Grand Rapids Fire Admin GR FD Adm Y N 4 4Keewatin Fire Admin KW FD Adm Y N 3 4Marble Fire Admin MB FD Adm Y N 4 4
Nashwauk Fire Admin NW FD Adm Y N 3 4Squaw Lake Fire Admin SQ FD Adm Y N 4 4
Taconite Fire Admin TC FD Adm Y N 3 4WarbaFeelySago Fire Admin WFS FD Adm Y N 4 4
Fire VHF Mu Aid FD Muaid Y Y 3 3Itasca Co EMS 1 IT EMS (AMB) 1 Y Y 5 2Itasca Co EMS 2 IT EMS (AMB) 2 Y Y 6 2
Itasca Co EMS Tac IT EMS (AMB) Tac Y Y 3
FireEMS Scene of Action SOAFIRE2 N N na na
Bigfork Ambulance Admin BF AMB Adm Y N 5Buck Lake 1st Responders BL 1st AdmDeer River Ambulance Admin DR AMB Adm Y N 6
Meds1 Ambulance Admin M1 AMB Adm Y N 5Naswauk Ambulance Admin NW AMB Adm
Squaw Lake 1st Resp Admin SQ 1st Adm Y N 6
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
24
Questionshellipso far
25
Simulcast Transmitting Systems
Simulcast Transmitting is defined as bull A radio system where the same radio
frequencies are Simultaneously Broadcast from all tower sites within the radio system
bull This allows same radio frequencies to be used throughout the entire coverage area
26
Simulcast Transmitting Systems
Simulcast Benefitsbull Seamless communications throughout the radio
systemrsquos coverage areabull Improved radio frequency utilizationbull Improved coverage in areas with difficult
terrainbull Improved in-building coverage (signals in
overlap zones are ldquoadditiverdquo)
27
Simulcast Transmitting Systems
Simulcast ldquoconsrdquo bull Not inexpensive technologybull Tower site spacing is critical (especially when
using NPSPAC frequencies)bull Signal ldquotimingrdquo is critical between all sitesbull Tower site interconnection (microwave T1
etc) is also critical and can be expensive
28
Simulcast Transmitting Systems
Site 1Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
29
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
Kandiyohi Co MN ndash with Simulcast
30
31
ldquoSimulcastrdquo fills in where single site canrsquot
32
Simulcast Issues
bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality
33
Simulcast Issues
bull Slightly out of phase -ldquoGhostingrdquo on a TV set
bull Out-of-phase signals can cause destructive cancellation
bull Fully in-phase signals produce constructive composite signal
34
Discussion and questions regarding Simulcast transmission
techniques and issues
35
Multicast Transmitting Systems
Multicast Transmitting is defined as bull A radio system where different radio
frequencies are used at each tower site within the radio system
Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost
36
Multicast Transmitting Systems
Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its
own set of frequencies)bull No Simulcast coverage benefits (overlap
voting)bull Units ldquoroamrdquo between sites
37
f1 f2 f3 f4 f5
f6 f7 f8 f9 f10
Kandiyohi Co MN ndash with Multicast
38
ARMER System
In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link
Typical ARMER tower site is Multicast Typical Local Ehancement system is
Simulcast
39
Zone Controller
40
Radio System Modulation Technologies
bull Analog vs DigitalMost existing Public Safety radio
systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why
41
Modulation Techniques
Analog transmission
Digital transmission
Information is sent by changing the frequency amplitude or phase of the radio signal
Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)
42
Modulation Techniques
bull Digital Benefits Clearer audio throughout system coverage
area
Improved radio frequency efficiency
Improved system coverage
Imbedded signaling options
Encryption with no range loss
43
Voting Receiver Technology
In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site
In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip
hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip
hellipwhich may be stronger than the original signal
44
Voting Receiver Systems
Site 1
Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5f1 f2 f3 f4 f5
Comparator
Received audio to System
45
Discussionamp
Questions
Slide Number 1
Presentation Agenda
ldquoTrunking 101rdquo
What is ldquoTrunkingrdquo
Conventional vs Trunked
Slide Number 6
Slide Number 7
Your Bank Tellers ndash as ldquoConventionalrdquo
Conventional vs Trunked
Trunked Radio Systems
Conventional vs Trunked
Conventional vs Trunked
Basic Trunking Diagram
Your Bank Tellers ndash as ldquoTrunkedrdquo
Conventional vs Trunked
So How Does It Work
Control Channel continuously transmits system data to all radios
Radio user presses TX button and radio information is sent via control channel to Central Controller
Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
When transmission is completed all units revert back to Control Channel
Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
Fire amp EMS Talk Groups
Questionshellipso far
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Kandiyohi Co MN ndash with Simulcast
Slide Number 31
Simulcast Issues
Simulcast Issues
Discussion and questions regarding Simulcast transmission techniques and issues
Multicast Transmitting Systems
Multicast Transmitting Systems
Kandiyohi Co MN ndash with Multicast
ARMER System
Slide Number 39
Radio System Modulation Technologies
Modulation Techniques
Modulation Techniques
Voting Receiver Technology
Voting Receiver Systems
DiscussionampQuestions
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
11
Conventional vs Trunked
Trunked Radio (repeater) systembull Uses a group of similar radio frequencies to
create a ldquopoolrdquo for radio system users to accessbull Systems can be built using VHF UHF or 800
Mhzbull A Channel is NOT a Frequencyhellip(generally)bull A Channel (on your radio) is now a computer-
generated codebull hellipand are now referred to as ldquoTalk Groupsrdquo
12
Conventional vs Trunked
Trunked Radio (repeater) systembull The entire system is managed by a computer
often referred to as the ldquoCentral Controllerrdquobull All radios in the system also are computer-
controlled and communicate to the central controller via one frequency known as the ldquoControl Channelrdquo
13
EMS
1 to 28 Channels
CH 1
CentralController
TX RX
CH 2
RXTX
CH 3
RXTX
CH 4
RXTX
CH 28
RXTX
ControlChannel
PD
Basic Trunking Diagram
FD
14
Your Bank Tellers ndash as ldquoTrunkedrdquo
Director CH 5CH 3 CH 4CH 2
EMS FD
PD
PD
Queueby
FirstAvailable
Teller
FD
IN
15
Conventional vs Trunked
Trunked Radio Benefits bull Greatly improved usage of scarce radio
frequenciesbull Greater overall radio system flexibility
includingChannel (Talk Group) capabilitiesVarious user features including Emergency
Alarm PTT ID Channel Regrouping Call Alert and Radio Inhibit
bull Brings radio users together on a common radio system
bull Consistency in radio coverage
16
So How Does It Work
17
Control Channel continuously transmits system data to all radios PD
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FDEMS
18
Radio user presses TX button and radio information is sent via control channel to
Central Controller
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
19
Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios
selected on same Talk Group
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
FD
20
Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the
voice transmission
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
FD
21
When transmission is completed all units revert back to Control Channel
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
FD
22
Radio System Fleetmapping
Radio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo
(Law Enforcement shown here)
1 Itasca Co Law 1 IT Law 1 Y Y 1 22 Itasca Co Law 2 IT Law 2 Y Y 2 23 Itasca Co Law 3 IT Law 3 Y Y 1 34 Itasca Co Law Tac IT Law Tac Y Y 2 35 Itasca Co SO Admin IT SO Adm Y N 1 36 Itasca Co Srch amp Res IT S-R Y N 2 37 Itasca Co Probation IT Prob Y N 1 38 Itasca Co SO Jail IT SO Jail N na na9 Grand Rapids PD GR PD Ops Y Y 2 210 Drug Task Force IT DTF Y N11 Emer Response Team IT ERT Y N
12 Law Scene of Action SOA P1 N N na na
13 Grand Rapids PD Admin GR PD Adm Y N 1 414 Bigfork Police Admin BF PD Adm Y N 2 415 Bovey Police Admin BV PD Adm Y N 1 416 Coleraine Police Admin CL PD Adm Y N 2 417 Deer River Police Admin DR PD Adm Y N 1 418 Keewatin Police Admin KW PD Adm Y N 2 419 Nashwauk Police Admin NW PD Adm Y N 1 4
Talk
grou
p Na
me
Talk
grou
p Al
ias
(ABB
R)
Trun
ked
Disp
atch
Fails
oft
Chan
nel
Talk
grou
p Pr
iorit
y
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
23
Fire amp EMS Talk Groups
Talkg
roup
Na
me
Talkg
roup
Alia
s (A
BBR)
Trun
ked
Disp
atch
Fails
oft
Chan
nel
Talkg
roup
Pr
iority
Itasca Co Fire 1 IT Fire 1 Y Y 3 2Itasca Co Fire 2 IT Fire 2 Y Y 4 2Itasca Co Fire 3 IT Fire 3 Y Y 3 3
Itasca Co Fire Tac IT Fire Tac Y Y 4 4
FireEMS Scene of Action SOAFIRE1 N N na na
Balsam Fire Admin BS FD Adm Y N 3 4Bigfork Fire Admin BF FD Adm Y N 4 4Bovey Fire Admin BV FD Adm Y N 3 4
Calumet Fire Admin CA FD Adm Y N 3 4Cohasset Fire Admin CH FD Adm Y N 4 4Coleraine Fire Admin CL FD Adm Y N 3 4Deer River Fire Admin DR FD Adm Y N 4 4Goodland Fire Admin GL FD Adm Y N 3 4
Grand Rapids Fire Admin GR FD Adm Y N 4 4Keewatin Fire Admin KW FD Adm Y N 3 4Marble Fire Admin MB FD Adm Y N 4 4
Nashwauk Fire Admin NW FD Adm Y N 3 4Squaw Lake Fire Admin SQ FD Adm Y N 4 4
Taconite Fire Admin TC FD Adm Y N 3 4WarbaFeelySago Fire Admin WFS FD Adm Y N 4 4
Fire VHF Mu Aid FD Muaid Y Y 3 3Itasca Co EMS 1 IT EMS (AMB) 1 Y Y 5 2Itasca Co EMS 2 IT EMS (AMB) 2 Y Y 6 2
Itasca Co EMS Tac IT EMS (AMB) Tac Y Y 3
FireEMS Scene of Action SOAFIRE2 N N na na
Bigfork Ambulance Admin BF AMB Adm Y N 5Buck Lake 1st Responders BL 1st AdmDeer River Ambulance Admin DR AMB Adm Y N 6
Meds1 Ambulance Admin M1 AMB Adm Y N 5Naswauk Ambulance Admin NW AMB Adm
Squaw Lake 1st Resp Admin SQ 1st Adm Y N 6
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
24
Questionshellipso far
25
Simulcast Transmitting Systems
Simulcast Transmitting is defined as bull A radio system where the same radio
frequencies are Simultaneously Broadcast from all tower sites within the radio system
bull This allows same radio frequencies to be used throughout the entire coverage area
26
Simulcast Transmitting Systems
Simulcast Benefitsbull Seamless communications throughout the radio
systemrsquos coverage areabull Improved radio frequency utilizationbull Improved coverage in areas with difficult
terrainbull Improved in-building coverage (signals in
overlap zones are ldquoadditiverdquo)
27
Simulcast Transmitting Systems
Simulcast ldquoconsrdquo bull Not inexpensive technologybull Tower site spacing is critical (especially when
using NPSPAC frequencies)bull Signal ldquotimingrdquo is critical between all sitesbull Tower site interconnection (microwave T1
etc) is also critical and can be expensive
28
Simulcast Transmitting Systems
Site 1Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
29
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
Kandiyohi Co MN ndash with Simulcast
30
31
ldquoSimulcastrdquo fills in where single site canrsquot
32
Simulcast Issues
bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality
33
Simulcast Issues
bull Slightly out of phase -ldquoGhostingrdquo on a TV set
bull Out-of-phase signals can cause destructive cancellation
bull Fully in-phase signals produce constructive composite signal
34
Discussion and questions regarding Simulcast transmission
techniques and issues
35
Multicast Transmitting Systems
Multicast Transmitting is defined as bull A radio system where different radio
frequencies are used at each tower site within the radio system
Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost
36
Multicast Transmitting Systems
Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its
own set of frequencies)bull No Simulcast coverage benefits (overlap
voting)bull Units ldquoroamrdquo between sites
37
f1 f2 f3 f4 f5
f6 f7 f8 f9 f10
Kandiyohi Co MN ndash with Multicast
38
ARMER System
In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link
Typical ARMER tower site is Multicast Typical Local Ehancement system is
Simulcast
39
Zone Controller
40
Radio System Modulation Technologies
bull Analog vs DigitalMost existing Public Safety radio
systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why
41
Modulation Techniques
Analog transmission
Digital transmission
Information is sent by changing the frequency amplitude or phase of the radio signal
Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)
42
Modulation Techniques
bull Digital Benefits Clearer audio throughout system coverage
area
Improved radio frequency efficiency
Improved system coverage
Imbedded signaling options
Encryption with no range loss
43
Voting Receiver Technology
In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site
In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip
hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip
hellipwhich may be stronger than the original signal
44
Voting Receiver Systems
Site 1
Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5f1 f2 f3 f4 f5
Comparator
Received audio to System
45
Discussionamp
Questions
Slide Number 1
Presentation Agenda
ldquoTrunking 101rdquo
What is ldquoTrunkingrdquo
Conventional vs Trunked
Slide Number 6
Slide Number 7
Your Bank Tellers ndash as ldquoConventionalrdquo
Conventional vs Trunked
Trunked Radio Systems
Conventional vs Trunked
Conventional vs Trunked
Basic Trunking Diagram
Your Bank Tellers ndash as ldquoTrunkedrdquo
Conventional vs Trunked
So How Does It Work
Control Channel continuously transmits system data to all radios
Radio user presses TX button and radio information is sent via control channel to Central Controller
Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
When transmission is completed all units revert back to Control Channel
Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
Fire amp EMS Talk Groups
Questionshellipso far
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Kandiyohi Co MN ndash with Simulcast
Slide Number 31
Simulcast Issues
Simulcast Issues
Discussion and questions regarding Simulcast transmission techniques and issues
Multicast Transmitting Systems
Multicast Transmitting Systems
Kandiyohi Co MN ndash with Multicast
ARMER System
Slide Number 39
Radio System Modulation Technologies
Modulation Techniques
Modulation Techniques
Voting Receiver Technology
Voting Receiver Systems
DiscussionampQuestions
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
12
Conventional vs Trunked
Trunked Radio (repeater) systembull The entire system is managed by a computer
often referred to as the ldquoCentral Controllerrdquobull All radios in the system also are computer-
controlled and communicate to the central controller via one frequency known as the ldquoControl Channelrdquo
13
EMS
1 to 28 Channels
CH 1
CentralController
TX RX
CH 2
RXTX
CH 3
RXTX
CH 4
RXTX
CH 28
RXTX
ControlChannel
PD
Basic Trunking Diagram
FD
14
Your Bank Tellers ndash as ldquoTrunkedrdquo
Director CH 5CH 3 CH 4CH 2
EMS FD
PD
PD
Queueby
FirstAvailable
Teller
FD
IN
15
Conventional vs Trunked
Trunked Radio Benefits bull Greatly improved usage of scarce radio
frequenciesbull Greater overall radio system flexibility
includingChannel (Talk Group) capabilitiesVarious user features including Emergency
Alarm PTT ID Channel Regrouping Call Alert and Radio Inhibit
bull Brings radio users together on a common radio system
bull Consistency in radio coverage
16
So How Does It Work
17
Control Channel continuously transmits system data to all radios PD
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FDEMS
18
Radio user presses TX button and radio information is sent via control channel to
Central Controller
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
19
Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios
selected on same Talk Group
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
FD
20
Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the
voice transmission
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
FD
21
When transmission is completed all units revert back to Control Channel
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
FD
22
Radio System Fleetmapping
Radio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo
(Law Enforcement shown here)
1 Itasca Co Law 1 IT Law 1 Y Y 1 22 Itasca Co Law 2 IT Law 2 Y Y 2 23 Itasca Co Law 3 IT Law 3 Y Y 1 34 Itasca Co Law Tac IT Law Tac Y Y 2 35 Itasca Co SO Admin IT SO Adm Y N 1 36 Itasca Co Srch amp Res IT S-R Y N 2 37 Itasca Co Probation IT Prob Y N 1 38 Itasca Co SO Jail IT SO Jail N na na9 Grand Rapids PD GR PD Ops Y Y 2 210 Drug Task Force IT DTF Y N11 Emer Response Team IT ERT Y N
12 Law Scene of Action SOA P1 N N na na
13 Grand Rapids PD Admin GR PD Adm Y N 1 414 Bigfork Police Admin BF PD Adm Y N 2 415 Bovey Police Admin BV PD Adm Y N 1 416 Coleraine Police Admin CL PD Adm Y N 2 417 Deer River Police Admin DR PD Adm Y N 1 418 Keewatin Police Admin KW PD Adm Y N 2 419 Nashwauk Police Admin NW PD Adm Y N 1 4
Talk
grou
p Na
me
Talk
grou
p Al
ias
(ABB
R)
Trun
ked
Disp
atch
Fails
oft
Chan
nel
Talk
grou
p Pr
iorit
y
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
23
Fire amp EMS Talk Groups
Talkg
roup
Na
me
Talkg
roup
Alia
s (A
BBR)
Trun
ked
Disp
atch
Fails
oft
Chan
nel
Talkg
roup
Pr
iority
Itasca Co Fire 1 IT Fire 1 Y Y 3 2Itasca Co Fire 2 IT Fire 2 Y Y 4 2Itasca Co Fire 3 IT Fire 3 Y Y 3 3
Itasca Co Fire Tac IT Fire Tac Y Y 4 4
FireEMS Scene of Action SOAFIRE1 N N na na
Balsam Fire Admin BS FD Adm Y N 3 4Bigfork Fire Admin BF FD Adm Y N 4 4Bovey Fire Admin BV FD Adm Y N 3 4
Calumet Fire Admin CA FD Adm Y N 3 4Cohasset Fire Admin CH FD Adm Y N 4 4Coleraine Fire Admin CL FD Adm Y N 3 4Deer River Fire Admin DR FD Adm Y N 4 4Goodland Fire Admin GL FD Adm Y N 3 4
Grand Rapids Fire Admin GR FD Adm Y N 4 4Keewatin Fire Admin KW FD Adm Y N 3 4Marble Fire Admin MB FD Adm Y N 4 4
Nashwauk Fire Admin NW FD Adm Y N 3 4Squaw Lake Fire Admin SQ FD Adm Y N 4 4
Taconite Fire Admin TC FD Adm Y N 3 4WarbaFeelySago Fire Admin WFS FD Adm Y N 4 4
Fire VHF Mu Aid FD Muaid Y Y 3 3Itasca Co EMS 1 IT EMS (AMB) 1 Y Y 5 2Itasca Co EMS 2 IT EMS (AMB) 2 Y Y 6 2
Itasca Co EMS Tac IT EMS (AMB) Tac Y Y 3
FireEMS Scene of Action SOAFIRE2 N N na na
Bigfork Ambulance Admin BF AMB Adm Y N 5Buck Lake 1st Responders BL 1st AdmDeer River Ambulance Admin DR AMB Adm Y N 6
Meds1 Ambulance Admin M1 AMB Adm Y N 5Naswauk Ambulance Admin NW AMB Adm
Squaw Lake 1st Resp Admin SQ 1st Adm Y N 6
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
24
Questionshellipso far
25
Simulcast Transmitting Systems
Simulcast Transmitting is defined as bull A radio system where the same radio
frequencies are Simultaneously Broadcast from all tower sites within the radio system
bull This allows same radio frequencies to be used throughout the entire coverage area
26
Simulcast Transmitting Systems
Simulcast Benefitsbull Seamless communications throughout the radio
systemrsquos coverage areabull Improved radio frequency utilizationbull Improved coverage in areas with difficult
terrainbull Improved in-building coverage (signals in
overlap zones are ldquoadditiverdquo)
27
Simulcast Transmitting Systems
Simulcast ldquoconsrdquo bull Not inexpensive technologybull Tower site spacing is critical (especially when
using NPSPAC frequencies)bull Signal ldquotimingrdquo is critical between all sitesbull Tower site interconnection (microwave T1
etc) is also critical and can be expensive
28
Simulcast Transmitting Systems
Site 1Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
29
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
Kandiyohi Co MN ndash with Simulcast
30
31
ldquoSimulcastrdquo fills in where single site canrsquot
32
Simulcast Issues
bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality
33
Simulcast Issues
bull Slightly out of phase -ldquoGhostingrdquo on a TV set
bull Out-of-phase signals can cause destructive cancellation
bull Fully in-phase signals produce constructive composite signal
34
Discussion and questions regarding Simulcast transmission
techniques and issues
35
Multicast Transmitting Systems
Multicast Transmitting is defined as bull A radio system where different radio
frequencies are used at each tower site within the radio system
Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost
36
Multicast Transmitting Systems
Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its
own set of frequencies)bull No Simulcast coverage benefits (overlap
voting)bull Units ldquoroamrdquo between sites
37
f1 f2 f3 f4 f5
f6 f7 f8 f9 f10
Kandiyohi Co MN ndash with Multicast
38
ARMER System
In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link
Typical ARMER tower site is Multicast Typical Local Ehancement system is
Simulcast
39
Zone Controller
40
Radio System Modulation Technologies
bull Analog vs DigitalMost existing Public Safety radio
systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why
41
Modulation Techniques
Analog transmission
Digital transmission
Information is sent by changing the frequency amplitude or phase of the radio signal
Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)
42
Modulation Techniques
bull Digital Benefits Clearer audio throughout system coverage
area
Improved radio frequency efficiency
Improved system coverage
Imbedded signaling options
Encryption with no range loss
43
Voting Receiver Technology
In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site
In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip
hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip
hellipwhich may be stronger than the original signal
44
Voting Receiver Systems
Site 1
Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5f1 f2 f3 f4 f5
Comparator
Received audio to System
45
Discussionamp
Questions
Slide Number 1
Presentation Agenda
ldquoTrunking 101rdquo
What is ldquoTrunkingrdquo
Conventional vs Trunked
Slide Number 6
Slide Number 7
Your Bank Tellers ndash as ldquoConventionalrdquo
Conventional vs Trunked
Trunked Radio Systems
Conventional vs Trunked
Conventional vs Trunked
Basic Trunking Diagram
Your Bank Tellers ndash as ldquoTrunkedrdquo
Conventional vs Trunked
So How Does It Work
Control Channel continuously transmits system data to all radios
Radio user presses TX button and radio information is sent via control channel to Central Controller
Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
When transmission is completed all units revert back to Control Channel
Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
Fire amp EMS Talk Groups
Questionshellipso far
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Kandiyohi Co MN ndash with Simulcast
Slide Number 31
Simulcast Issues
Simulcast Issues
Discussion and questions regarding Simulcast transmission techniques and issues
Multicast Transmitting Systems
Multicast Transmitting Systems
Kandiyohi Co MN ndash with Multicast
ARMER System
Slide Number 39
Radio System Modulation Technologies
Modulation Techniques
Modulation Techniques
Voting Receiver Technology
Voting Receiver Systems
DiscussionampQuestions
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
13
EMS
1 to 28 Channels
CH 1
CentralController
TX RX
CH 2
RXTX
CH 3
RXTX
CH 4
RXTX
CH 28
RXTX
ControlChannel
PD
Basic Trunking Diagram
FD
14
Your Bank Tellers ndash as ldquoTrunkedrdquo
Director CH 5CH 3 CH 4CH 2
EMS FD
PD
PD
Queueby
FirstAvailable
Teller
FD
IN
15
Conventional vs Trunked
Trunked Radio Benefits bull Greatly improved usage of scarce radio
frequenciesbull Greater overall radio system flexibility
includingChannel (Talk Group) capabilitiesVarious user features including Emergency
Alarm PTT ID Channel Regrouping Call Alert and Radio Inhibit
bull Brings radio users together on a common radio system
bull Consistency in radio coverage
16
So How Does It Work
17
Control Channel continuously transmits system data to all radios PD
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FDEMS
18
Radio user presses TX button and radio information is sent via control channel to
Central Controller
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
19
Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios
selected on same Talk Group
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
FD
20
Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the
voice transmission
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
FD
21
When transmission is completed all units revert back to Control Channel
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
FD
22
Radio System Fleetmapping
Radio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo
(Law Enforcement shown here)
1 Itasca Co Law 1 IT Law 1 Y Y 1 22 Itasca Co Law 2 IT Law 2 Y Y 2 23 Itasca Co Law 3 IT Law 3 Y Y 1 34 Itasca Co Law Tac IT Law Tac Y Y 2 35 Itasca Co SO Admin IT SO Adm Y N 1 36 Itasca Co Srch amp Res IT S-R Y N 2 37 Itasca Co Probation IT Prob Y N 1 38 Itasca Co SO Jail IT SO Jail N na na9 Grand Rapids PD GR PD Ops Y Y 2 210 Drug Task Force IT DTF Y N11 Emer Response Team IT ERT Y N
12 Law Scene of Action SOA P1 N N na na
13 Grand Rapids PD Admin GR PD Adm Y N 1 414 Bigfork Police Admin BF PD Adm Y N 2 415 Bovey Police Admin BV PD Adm Y N 1 416 Coleraine Police Admin CL PD Adm Y N 2 417 Deer River Police Admin DR PD Adm Y N 1 418 Keewatin Police Admin KW PD Adm Y N 2 419 Nashwauk Police Admin NW PD Adm Y N 1 4
Talk
grou
p Na
me
Talk
grou
p Al
ias
(ABB
R)
Trun
ked
Disp
atch
Fails
oft
Chan
nel
Talk
grou
p Pr
iorit
y
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
23
Fire amp EMS Talk Groups
Talkg
roup
Na
me
Talkg
roup
Alia
s (A
BBR)
Trun
ked
Disp
atch
Fails
oft
Chan
nel
Talkg
roup
Pr
iority
Itasca Co Fire 1 IT Fire 1 Y Y 3 2Itasca Co Fire 2 IT Fire 2 Y Y 4 2Itasca Co Fire 3 IT Fire 3 Y Y 3 3
Itasca Co Fire Tac IT Fire Tac Y Y 4 4
FireEMS Scene of Action SOAFIRE1 N N na na
Balsam Fire Admin BS FD Adm Y N 3 4Bigfork Fire Admin BF FD Adm Y N 4 4Bovey Fire Admin BV FD Adm Y N 3 4
Calumet Fire Admin CA FD Adm Y N 3 4Cohasset Fire Admin CH FD Adm Y N 4 4Coleraine Fire Admin CL FD Adm Y N 3 4Deer River Fire Admin DR FD Adm Y N 4 4Goodland Fire Admin GL FD Adm Y N 3 4
Grand Rapids Fire Admin GR FD Adm Y N 4 4Keewatin Fire Admin KW FD Adm Y N 3 4Marble Fire Admin MB FD Adm Y N 4 4
Nashwauk Fire Admin NW FD Adm Y N 3 4Squaw Lake Fire Admin SQ FD Adm Y N 4 4
Taconite Fire Admin TC FD Adm Y N 3 4WarbaFeelySago Fire Admin WFS FD Adm Y N 4 4
Fire VHF Mu Aid FD Muaid Y Y 3 3Itasca Co EMS 1 IT EMS (AMB) 1 Y Y 5 2Itasca Co EMS 2 IT EMS (AMB) 2 Y Y 6 2
Itasca Co EMS Tac IT EMS (AMB) Tac Y Y 3
FireEMS Scene of Action SOAFIRE2 N N na na
Bigfork Ambulance Admin BF AMB Adm Y N 5Buck Lake 1st Responders BL 1st AdmDeer River Ambulance Admin DR AMB Adm Y N 6
Meds1 Ambulance Admin M1 AMB Adm Y N 5Naswauk Ambulance Admin NW AMB Adm
Squaw Lake 1st Resp Admin SQ 1st Adm Y N 6
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
24
Questionshellipso far
25
Simulcast Transmitting Systems
Simulcast Transmitting is defined as bull A radio system where the same radio
frequencies are Simultaneously Broadcast from all tower sites within the radio system
bull This allows same radio frequencies to be used throughout the entire coverage area
26
Simulcast Transmitting Systems
Simulcast Benefitsbull Seamless communications throughout the radio
systemrsquos coverage areabull Improved radio frequency utilizationbull Improved coverage in areas with difficult
terrainbull Improved in-building coverage (signals in
overlap zones are ldquoadditiverdquo)
27
Simulcast Transmitting Systems
Simulcast ldquoconsrdquo bull Not inexpensive technologybull Tower site spacing is critical (especially when
using NPSPAC frequencies)bull Signal ldquotimingrdquo is critical between all sitesbull Tower site interconnection (microwave T1
etc) is also critical and can be expensive
28
Simulcast Transmitting Systems
Site 1Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
29
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
Kandiyohi Co MN ndash with Simulcast
30
31
ldquoSimulcastrdquo fills in where single site canrsquot
32
Simulcast Issues
bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality
33
Simulcast Issues
bull Slightly out of phase -ldquoGhostingrdquo on a TV set
bull Out-of-phase signals can cause destructive cancellation
bull Fully in-phase signals produce constructive composite signal
34
Discussion and questions regarding Simulcast transmission
techniques and issues
35
Multicast Transmitting Systems
Multicast Transmitting is defined as bull A radio system where different radio
frequencies are used at each tower site within the radio system
Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost
36
Multicast Transmitting Systems
Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its
own set of frequencies)bull No Simulcast coverage benefits (overlap
voting)bull Units ldquoroamrdquo between sites
37
f1 f2 f3 f4 f5
f6 f7 f8 f9 f10
Kandiyohi Co MN ndash with Multicast
38
ARMER System
In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link
Typical ARMER tower site is Multicast Typical Local Ehancement system is
Simulcast
39
Zone Controller
40
Radio System Modulation Technologies
bull Analog vs DigitalMost existing Public Safety radio
systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why
41
Modulation Techniques
Analog transmission
Digital transmission
Information is sent by changing the frequency amplitude or phase of the radio signal
Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)
42
Modulation Techniques
bull Digital Benefits Clearer audio throughout system coverage
area
Improved radio frequency efficiency
Improved system coverage
Imbedded signaling options
Encryption with no range loss
43
Voting Receiver Technology
In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site
In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip
hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip
hellipwhich may be stronger than the original signal
44
Voting Receiver Systems
Site 1
Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5f1 f2 f3 f4 f5
Comparator
Received audio to System
45
Discussionamp
Questions
Slide Number 1
Presentation Agenda
ldquoTrunking 101rdquo
What is ldquoTrunkingrdquo
Conventional vs Trunked
Slide Number 6
Slide Number 7
Your Bank Tellers ndash as ldquoConventionalrdquo
Conventional vs Trunked
Trunked Radio Systems
Conventional vs Trunked
Conventional vs Trunked
Basic Trunking Diagram
Your Bank Tellers ndash as ldquoTrunkedrdquo
Conventional vs Trunked
So How Does It Work
Control Channel continuously transmits system data to all radios
Radio user presses TX button and radio information is sent via control channel to Central Controller
Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
When transmission is completed all units revert back to Control Channel
Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
Fire amp EMS Talk Groups
Questionshellipso far
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Kandiyohi Co MN ndash with Simulcast
Slide Number 31
Simulcast Issues
Simulcast Issues
Discussion and questions regarding Simulcast transmission techniques and issues
Multicast Transmitting Systems
Multicast Transmitting Systems
Kandiyohi Co MN ndash with Multicast
ARMER System
Slide Number 39
Radio System Modulation Technologies
Modulation Techniques
Modulation Techniques
Voting Receiver Technology
Voting Receiver Systems
DiscussionampQuestions
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
14
Your Bank Tellers ndash as ldquoTrunkedrdquo
Director CH 5CH 3 CH 4CH 2
EMS FD
PD
PD
Queueby
FirstAvailable
Teller
FD
IN
15
Conventional vs Trunked
Trunked Radio Benefits bull Greatly improved usage of scarce radio
frequenciesbull Greater overall radio system flexibility
includingChannel (Talk Group) capabilitiesVarious user features including Emergency
Alarm PTT ID Channel Regrouping Call Alert and Radio Inhibit
bull Brings radio users together on a common radio system
bull Consistency in radio coverage
16
So How Does It Work
17
Control Channel continuously transmits system data to all radios PD
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FDEMS
18
Radio user presses TX button and radio information is sent via control channel to
Central Controller
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
19
Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios
selected on same Talk Group
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
FD
20
Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the
voice transmission
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
FD
21
When transmission is completed all units revert back to Control Channel
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
FD
22
Radio System Fleetmapping
Radio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo
(Law Enforcement shown here)
1 Itasca Co Law 1 IT Law 1 Y Y 1 22 Itasca Co Law 2 IT Law 2 Y Y 2 23 Itasca Co Law 3 IT Law 3 Y Y 1 34 Itasca Co Law Tac IT Law Tac Y Y 2 35 Itasca Co SO Admin IT SO Adm Y N 1 36 Itasca Co Srch amp Res IT S-R Y N 2 37 Itasca Co Probation IT Prob Y N 1 38 Itasca Co SO Jail IT SO Jail N na na9 Grand Rapids PD GR PD Ops Y Y 2 210 Drug Task Force IT DTF Y N11 Emer Response Team IT ERT Y N
12 Law Scene of Action SOA P1 N N na na
13 Grand Rapids PD Admin GR PD Adm Y N 1 414 Bigfork Police Admin BF PD Adm Y N 2 415 Bovey Police Admin BV PD Adm Y N 1 416 Coleraine Police Admin CL PD Adm Y N 2 417 Deer River Police Admin DR PD Adm Y N 1 418 Keewatin Police Admin KW PD Adm Y N 2 419 Nashwauk Police Admin NW PD Adm Y N 1 4
Talk
grou
p Na
me
Talk
grou
p Al
ias
(ABB
R)
Trun
ked
Disp
atch
Fails
oft
Chan
nel
Talk
grou
p Pr
iorit
y
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
23
Fire amp EMS Talk Groups
Talkg
roup
Na
me
Talkg
roup
Alia
s (A
BBR)
Trun
ked
Disp
atch
Fails
oft
Chan
nel
Talkg
roup
Pr
iority
Itasca Co Fire 1 IT Fire 1 Y Y 3 2Itasca Co Fire 2 IT Fire 2 Y Y 4 2Itasca Co Fire 3 IT Fire 3 Y Y 3 3
Itasca Co Fire Tac IT Fire Tac Y Y 4 4
FireEMS Scene of Action SOAFIRE1 N N na na
Balsam Fire Admin BS FD Adm Y N 3 4Bigfork Fire Admin BF FD Adm Y N 4 4Bovey Fire Admin BV FD Adm Y N 3 4
Calumet Fire Admin CA FD Adm Y N 3 4Cohasset Fire Admin CH FD Adm Y N 4 4Coleraine Fire Admin CL FD Adm Y N 3 4Deer River Fire Admin DR FD Adm Y N 4 4Goodland Fire Admin GL FD Adm Y N 3 4
Grand Rapids Fire Admin GR FD Adm Y N 4 4Keewatin Fire Admin KW FD Adm Y N 3 4Marble Fire Admin MB FD Adm Y N 4 4
Nashwauk Fire Admin NW FD Adm Y N 3 4Squaw Lake Fire Admin SQ FD Adm Y N 4 4
Taconite Fire Admin TC FD Adm Y N 3 4WarbaFeelySago Fire Admin WFS FD Adm Y N 4 4
Fire VHF Mu Aid FD Muaid Y Y 3 3Itasca Co EMS 1 IT EMS (AMB) 1 Y Y 5 2Itasca Co EMS 2 IT EMS (AMB) 2 Y Y 6 2
Itasca Co EMS Tac IT EMS (AMB) Tac Y Y 3
FireEMS Scene of Action SOAFIRE2 N N na na
Bigfork Ambulance Admin BF AMB Adm Y N 5Buck Lake 1st Responders BL 1st AdmDeer River Ambulance Admin DR AMB Adm Y N 6
Meds1 Ambulance Admin M1 AMB Adm Y N 5Naswauk Ambulance Admin NW AMB Adm
Squaw Lake 1st Resp Admin SQ 1st Adm Y N 6
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
24
Questionshellipso far
25
Simulcast Transmitting Systems
Simulcast Transmitting is defined as bull A radio system where the same radio
frequencies are Simultaneously Broadcast from all tower sites within the radio system
bull This allows same radio frequencies to be used throughout the entire coverage area
26
Simulcast Transmitting Systems
Simulcast Benefitsbull Seamless communications throughout the radio
systemrsquos coverage areabull Improved radio frequency utilizationbull Improved coverage in areas with difficult
terrainbull Improved in-building coverage (signals in
overlap zones are ldquoadditiverdquo)
27
Simulcast Transmitting Systems
Simulcast ldquoconsrdquo bull Not inexpensive technologybull Tower site spacing is critical (especially when
using NPSPAC frequencies)bull Signal ldquotimingrdquo is critical between all sitesbull Tower site interconnection (microwave T1
etc) is also critical and can be expensive
28
Simulcast Transmitting Systems
Site 1Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
29
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
Kandiyohi Co MN ndash with Simulcast
30
31
ldquoSimulcastrdquo fills in where single site canrsquot
32
Simulcast Issues
bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality
33
Simulcast Issues
bull Slightly out of phase -ldquoGhostingrdquo on a TV set
bull Out-of-phase signals can cause destructive cancellation
bull Fully in-phase signals produce constructive composite signal
34
Discussion and questions regarding Simulcast transmission
techniques and issues
35
Multicast Transmitting Systems
Multicast Transmitting is defined as bull A radio system where different radio
frequencies are used at each tower site within the radio system
Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost
36
Multicast Transmitting Systems
Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its
own set of frequencies)bull No Simulcast coverage benefits (overlap
voting)bull Units ldquoroamrdquo between sites
37
f1 f2 f3 f4 f5
f6 f7 f8 f9 f10
Kandiyohi Co MN ndash with Multicast
38
ARMER System
In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link
Typical ARMER tower site is Multicast Typical Local Ehancement system is
Simulcast
39
Zone Controller
40
Radio System Modulation Technologies
bull Analog vs DigitalMost existing Public Safety radio
systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why
41
Modulation Techniques
Analog transmission
Digital transmission
Information is sent by changing the frequency amplitude or phase of the radio signal
Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)
42
Modulation Techniques
bull Digital Benefits Clearer audio throughout system coverage
area
Improved radio frequency efficiency
Improved system coverage
Imbedded signaling options
Encryption with no range loss
43
Voting Receiver Technology
In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site
In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip
hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip
hellipwhich may be stronger than the original signal
44
Voting Receiver Systems
Site 1
Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5f1 f2 f3 f4 f5
Comparator
Received audio to System
45
Discussionamp
Questions
Slide Number 1
Presentation Agenda
ldquoTrunking 101rdquo
What is ldquoTrunkingrdquo
Conventional vs Trunked
Slide Number 6
Slide Number 7
Your Bank Tellers ndash as ldquoConventionalrdquo
Conventional vs Trunked
Trunked Radio Systems
Conventional vs Trunked
Conventional vs Trunked
Basic Trunking Diagram
Your Bank Tellers ndash as ldquoTrunkedrdquo
Conventional vs Trunked
So How Does It Work
Control Channel continuously transmits system data to all radios
Radio user presses TX button and radio information is sent via control channel to Central Controller
Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
When transmission is completed all units revert back to Control Channel
Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
Fire amp EMS Talk Groups
Questionshellipso far
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Kandiyohi Co MN ndash with Simulcast
Slide Number 31
Simulcast Issues
Simulcast Issues
Discussion and questions regarding Simulcast transmission techniques and issues
Multicast Transmitting Systems
Multicast Transmitting Systems
Kandiyohi Co MN ndash with Multicast
ARMER System
Slide Number 39
Radio System Modulation Technologies
Modulation Techniques
Modulation Techniques
Voting Receiver Technology
Voting Receiver Systems
DiscussionampQuestions
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
15
Conventional vs Trunked
Trunked Radio Benefits bull Greatly improved usage of scarce radio
frequenciesbull Greater overall radio system flexibility
includingChannel (Talk Group) capabilitiesVarious user features including Emergency
Alarm PTT ID Channel Regrouping Call Alert and Radio Inhibit
bull Brings radio users together on a common radio system
bull Consistency in radio coverage
16
So How Does It Work
17
Control Channel continuously transmits system data to all radios PD
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FDEMS
18
Radio user presses TX button and radio information is sent via control channel to
Central Controller
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
19
Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios
selected on same Talk Group
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
FD
20
Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the
voice transmission
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
FD
21
When transmission is completed all units revert back to Control Channel
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
FD
22
Radio System Fleetmapping
Radio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo
(Law Enforcement shown here)
1 Itasca Co Law 1 IT Law 1 Y Y 1 22 Itasca Co Law 2 IT Law 2 Y Y 2 23 Itasca Co Law 3 IT Law 3 Y Y 1 34 Itasca Co Law Tac IT Law Tac Y Y 2 35 Itasca Co SO Admin IT SO Adm Y N 1 36 Itasca Co Srch amp Res IT S-R Y N 2 37 Itasca Co Probation IT Prob Y N 1 38 Itasca Co SO Jail IT SO Jail N na na9 Grand Rapids PD GR PD Ops Y Y 2 210 Drug Task Force IT DTF Y N11 Emer Response Team IT ERT Y N
12 Law Scene of Action SOA P1 N N na na
13 Grand Rapids PD Admin GR PD Adm Y N 1 414 Bigfork Police Admin BF PD Adm Y N 2 415 Bovey Police Admin BV PD Adm Y N 1 416 Coleraine Police Admin CL PD Adm Y N 2 417 Deer River Police Admin DR PD Adm Y N 1 418 Keewatin Police Admin KW PD Adm Y N 2 419 Nashwauk Police Admin NW PD Adm Y N 1 4
Talk
grou
p Na
me
Talk
grou
p Al
ias
(ABB
R)
Trun
ked
Disp
atch
Fails
oft
Chan
nel
Talk
grou
p Pr
iorit
y
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
23
Fire amp EMS Talk Groups
Talkg
roup
Na
me
Talkg
roup
Alia
s (A
BBR)
Trun
ked
Disp
atch
Fails
oft
Chan
nel
Talkg
roup
Pr
iority
Itasca Co Fire 1 IT Fire 1 Y Y 3 2Itasca Co Fire 2 IT Fire 2 Y Y 4 2Itasca Co Fire 3 IT Fire 3 Y Y 3 3
Itasca Co Fire Tac IT Fire Tac Y Y 4 4
FireEMS Scene of Action SOAFIRE1 N N na na
Balsam Fire Admin BS FD Adm Y N 3 4Bigfork Fire Admin BF FD Adm Y N 4 4Bovey Fire Admin BV FD Adm Y N 3 4
Calumet Fire Admin CA FD Adm Y N 3 4Cohasset Fire Admin CH FD Adm Y N 4 4Coleraine Fire Admin CL FD Adm Y N 3 4Deer River Fire Admin DR FD Adm Y N 4 4Goodland Fire Admin GL FD Adm Y N 3 4
Grand Rapids Fire Admin GR FD Adm Y N 4 4Keewatin Fire Admin KW FD Adm Y N 3 4Marble Fire Admin MB FD Adm Y N 4 4
Nashwauk Fire Admin NW FD Adm Y N 3 4Squaw Lake Fire Admin SQ FD Adm Y N 4 4
Taconite Fire Admin TC FD Adm Y N 3 4WarbaFeelySago Fire Admin WFS FD Adm Y N 4 4
Fire VHF Mu Aid FD Muaid Y Y 3 3Itasca Co EMS 1 IT EMS (AMB) 1 Y Y 5 2Itasca Co EMS 2 IT EMS (AMB) 2 Y Y 6 2
Itasca Co EMS Tac IT EMS (AMB) Tac Y Y 3
FireEMS Scene of Action SOAFIRE2 N N na na
Bigfork Ambulance Admin BF AMB Adm Y N 5Buck Lake 1st Responders BL 1st AdmDeer River Ambulance Admin DR AMB Adm Y N 6
Meds1 Ambulance Admin M1 AMB Adm Y N 5Naswauk Ambulance Admin NW AMB Adm
Squaw Lake 1st Resp Admin SQ 1st Adm Y N 6
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
24
Questionshellipso far
25
Simulcast Transmitting Systems
Simulcast Transmitting is defined as bull A radio system where the same radio
frequencies are Simultaneously Broadcast from all tower sites within the radio system
bull This allows same radio frequencies to be used throughout the entire coverage area
26
Simulcast Transmitting Systems
Simulcast Benefitsbull Seamless communications throughout the radio
systemrsquos coverage areabull Improved radio frequency utilizationbull Improved coverage in areas with difficult
terrainbull Improved in-building coverage (signals in
overlap zones are ldquoadditiverdquo)
27
Simulcast Transmitting Systems
Simulcast ldquoconsrdquo bull Not inexpensive technologybull Tower site spacing is critical (especially when
using NPSPAC frequencies)bull Signal ldquotimingrdquo is critical between all sitesbull Tower site interconnection (microwave T1
etc) is also critical and can be expensive
28
Simulcast Transmitting Systems
Site 1Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
29
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
Kandiyohi Co MN ndash with Simulcast
30
31
ldquoSimulcastrdquo fills in where single site canrsquot
32
Simulcast Issues
bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality
33
Simulcast Issues
bull Slightly out of phase -ldquoGhostingrdquo on a TV set
bull Out-of-phase signals can cause destructive cancellation
bull Fully in-phase signals produce constructive composite signal
34
Discussion and questions regarding Simulcast transmission
techniques and issues
35
Multicast Transmitting Systems
Multicast Transmitting is defined as bull A radio system where different radio
frequencies are used at each tower site within the radio system
Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost
36
Multicast Transmitting Systems
Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its
own set of frequencies)bull No Simulcast coverage benefits (overlap
voting)bull Units ldquoroamrdquo between sites
37
f1 f2 f3 f4 f5
f6 f7 f8 f9 f10
Kandiyohi Co MN ndash with Multicast
38
ARMER System
In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link
Typical ARMER tower site is Multicast Typical Local Ehancement system is
Simulcast
39
Zone Controller
40
Radio System Modulation Technologies
bull Analog vs DigitalMost existing Public Safety radio
systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why
41
Modulation Techniques
Analog transmission
Digital transmission
Information is sent by changing the frequency amplitude or phase of the radio signal
Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)
42
Modulation Techniques
bull Digital Benefits Clearer audio throughout system coverage
area
Improved radio frequency efficiency
Improved system coverage
Imbedded signaling options
Encryption with no range loss
43
Voting Receiver Technology
In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site
In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip
hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip
hellipwhich may be stronger than the original signal
44
Voting Receiver Systems
Site 1
Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5f1 f2 f3 f4 f5
Comparator
Received audio to System
45
Discussionamp
Questions
Slide Number 1
Presentation Agenda
ldquoTrunking 101rdquo
What is ldquoTrunkingrdquo
Conventional vs Trunked
Slide Number 6
Slide Number 7
Your Bank Tellers ndash as ldquoConventionalrdquo
Conventional vs Trunked
Trunked Radio Systems
Conventional vs Trunked
Conventional vs Trunked
Basic Trunking Diagram
Your Bank Tellers ndash as ldquoTrunkedrdquo
Conventional vs Trunked
So How Does It Work
Control Channel continuously transmits system data to all radios
Radio user presses TX button and radio information is sent via control channel to Central Controller
Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
When transmission is completed all units revert back to Control Channel
Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
Fire amp EMS Talk Groups
Questionshellipso far
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Kandiyohi Co MN ndash with Simulcast
Slide Number 31
Simulcast Issues
Simulcast Issues
Discussion and questions regarding Simulcast transmission techniques and issues
Multicast Transmitting Systems
Multicast Transmitting Systems
Kandiyohi Co MN ndash with Multicast
ARMER System
Slide Number 39
Radio System Modulation Technologies
Modulation Techniques
Modulation Techniques
Voting Receiver Technology
Voting Receiver Systems
DiscussionampQuestions
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
16
So How Does It Work
17
Control Channel continuously transmits system data to all radios PD
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FDEMS
18
Radio user presses TX button and radio information is sent via control channel to
Central Controller
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
19
Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios
selected on same Talk Group
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
FD
20
Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the
voice transmission
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
FD
21
When transmission is completed all units revert back to Control Channel
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
FD
22
Radio System Fleetmapping
Radio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo
(Law Enforcement shown here)
1 Itasca Co Law 1 IT Law 1 Y Y 1 22 Itasca Co Law 2 IT Law 2 Y Y 2 23 Itasca Co Law 3 IT Law 3 Y Y 1 34 Itasca Co Law Tac IT Law Tac Y Y 2 35 Itasca Co SO Admin IT SO Adm Y N 1 36 Itasca Co Srch amp Res IT S-R Y N 2 37 Itasca Co Probation IT Prob Y N 1 38 Itasca Co SO Jail IT SO Jail N na na9 Grand Rapids PD GR PD Ops Y Y 2 210 Drug Task Force IT DTF Y N11 Emer Response Team IT ERT Y N
12 Law Scene of Action SOA P1 N N na na
13 Grand Rapids PD Admin GR PD Adm Y N 1 414 Bigfork Police Admin BF PD Adm Y N 2 415 Bovey Police Admin BV PD Adm Y N 1 416 Coleraine Police Admin CL PD Adm Y N 2 417 Deer River Police Admin DR PD Adm Y N 1 418 Keewatin Police Admin KW PD Adm Y N 2 419 Nashwauk Police Admin NW PD Adm Y N 1 4
Talk
grou
p Na
me
Talk
grou
p Al
ias
(ABB
R)
Trun
ked
Disp
atch
Fails
oft
Chan
nel
Talk
grou
p Pr
iorit
y
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
23
Fire amp EMS Talk Groups
Talkg
roup
Na
me
Talkg
roup
Alia
s (A
BBR)
Trun
ked
Disp
atch
Fails
oft
Chan
nel
Talkg
roup
Pr
iority
Itasca Co Fire 1 IT Fire 1 Y Y 3 2Itasca Co Fire 2 IT Fire 2 Y Y 4 2Itasca Co Fire 3 IT Fire 3 Y Y 3 3
Itasca Co Fire Tac IT Fire Tac Y Y 4 4
FireEMS Scene of Action SOAFIRE1 N N na na
Balsam Fire Admin BS FD Adm Y N 3 4Bigfork Fire Admin BF FD Adm Y N 4 4Bovey Fire Admin BV FD Adm Y N 3 4
Calumet Fire Admin CA FD Adm Y N 3 4Cohasset Fire Admin CH FD Adm Y N 4 4Coleraine Fire Admin CL FD Adm Y N 3 4Deer River Fire Admin DR FD Adm Y N 4 4Goodland Fire Admin GL FD Adm Y N 3 4
Grand Rapids Fire Admin GR FD Adm Y N 4 4Keewatin Fire Admin KW FD Adm Y N 3 4Marble Fire Admin MB FD Adm Y N 4 4
Nashwauk Fire Admin NW FD Adm Y N 3 4Squaw Lake Fire Admin SQ FD Adm Y N 4 4
Taconite Fire Admin TC FD Adm Y N 3 4WarbaFeelySago Fire Admin WFS FD Adm Y N 4 4
Fire VHF Mu Aid FD Muaid Y Y 3 3Itasca Co EMS 1 IT EMS (AMB) 1 Y Y 5 2Itasca Co EMS 2 IT EMS (AMB) 2 Y Y 6 2
Itasca Co EMS Tac IT EMS (AMB) Tac Y Y 3
FireEMS Scene of Action SOAFIRE2 N N na na
Bigfork Ambulance Admin BF AMB Adm Y N 5Buck Lake 1st Responders BL 1st AdmDeer River Ambulance Admin DR AMB Adm Y N 6
Meds1 Ambulance Admin M1 AMB Adm Y N 5Naswauk Ambulance Admin NW AMB Adm
Squaw Lake 1st Resp Admin SQ 1st Adm Y N 6
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
24
Questionshellipso far
25
Simulcast Transmitting Systems
Simulcast Transmitting is defined as bull A radio system where the same radio
frequencies are Simultaneously Broadcast from all tower sites within the radio system
bull This allows same radio frequencies to be used throughout the entire coverage area
26
Simulcast Transmitting Systems
Simulcast Benefitsbull Seamless communications throughout the radio
systemrsquos coverage areabull Improved radio frequency utilizationbull Improved coverage in areas with difficult
terrainbull Improved in-building coverage (signals in
overlap zones are ldquoadditiverdquo)
27
Simulcast Transmitting Systems
Simulcast ldquoconsrdquo bull Not inexpensive technologybull Tower site spacing is critical (especially when
using NPSPAC frequencies)bull Signal ldquotimingrdquo is critical between all sitesbull Tower site interconnection (microwave T1
etc) is also critical and can be expensive
28
Simulcast Transmitting Systems
Site 1Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
29
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
Kandiyohi Co MN ndash with Simulcast
30
31
ldquoSimulcastrdquo fills in where single site canrsquot
32
Simulcast Issues
bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality
33
Simulcast Issues
bull Slightly out of phase -ldquoGhostingrdquo on a TV set
bull Out-of-phase signals can cause destructive cancellation
bull Fully in-phase signals produce constructive composite signal
34
Discussion and questions regarding Simulcast transmission
techniques and issues
35
Multicast Transmitting Systems
Multicast Transmitting is defined as bull A radio system where different radio
frequencies are used at each tower site within the radio system
Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost
36
Multicast Transmitting Systems
Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its
own set of frequencies)bull No Simulcast coverage benefits (overlap
voting)bull Units ldquoroamrdquo between sites
37
f1 f2 f3 f4 f5
f6 f7 f8 f9 f10
Kandiyohi Co MN ndash with Multicast
38
ARMER System
In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link
Typical ARMER tower site is Multicast Typical Local Ehancement system is
Simulcast
39
Zone Controller
40
Radio System Modulation Technologies
bull Analog vs DigitalMost existing Public Safety radio
systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why
41
Modulation Techniques
Analog transmission
Digital transmission
Information is sent by changing the frequency amplitude or phase of the radio signal
Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)
42
Modulation Techniques
bull Digital Benefits Clearer audio throughout system coverage
area
Improved radio frequency efficiency
Improved system coverage
Imbedded signaling options
Encryption with no range loss
43
Voting Receiver Technology
In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site
In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip
hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip
hellipwhich may be stronger than the original signal
44
Voting Receiver Systems
Site 1
Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5f1 f2 f3 f4 f5
Comparator
Received audio to System
45
Discussionamp
Questions
Slide Number 1
Presentation Agenda
ldquoTrunking 101rdquo
What is ldquoTrunkingrdquo
Conventional vs Trunked
Slide Number 6
Slide Number 7
Your Bank Tellers ndash as ldquoConventionalrdquo
Conventional vs Trunked
Trunked Radio Systems
Conventional vs Trunked
Conventional vs Trunked
Basic Trunking Diagram
Your Bank Tellers ndash as ldquoTrunkedrdquo
Conventional vs Trunked
So How Does It Work
Control Channel continuously transmits system data to all radios
Radio user presses TX button and radio information is sent via control channel to Central Controller
Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
When transmission is completed all units revert back to Control Channel
Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
Fire amp EMS Talk Groups
Questionshellipso far
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Kandiyohi Co MN ndash with Simulcast
Slide Number 31
Simulcast Issues
Simulcast Issues
Discussion and questions regarding Simulcast transmission techniques and issues
Multicast Transmitting Systems
Multicast Transmitting Systems
Kandiyohi Co MN ndash with Multicast
ARMER System
Slide Number 39
Radio System Modulation Technologies
Modulation Techniques
Modulation Techniques
Voting Receiver Technology
Voting Receiver Systems
DiscussionampQuestions
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
17
Control Channel continuously transmits system data to all radios PD
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FDEMS
18
Radio user presses TX button and radio information is sent via control channel to
Central Controller
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
19
Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios
selected on same Talk Group
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
FD
20
Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the
voice transmission
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
FD
21
When transmission is completed all units revert back to Control Channel
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
FD
22
Radio System Fleetmapping
Radio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo
(Law Enforcement shown here)
1 Itasca Co Law 1 IT Law 1 Y Y 1 22 Itasca Co Law 2 IT Law 2 Y Y 2 23 Itasca Co Law 3 IT Law 3 Y Y 1 34 Itasca Co Law Tac IT Law Tac Y Y 2 35 Itasca Co SO Admin IT SO Adm Y N 1 36 Itasca Co Srch amp Res IT S-R Y N 2 37 Itasca Co Probation IT Prob Y N 1 38 Itasca Co SO Jail IT SO Jail N na na9 Grand Rapids PD GR PD Ops Y Y 2 210 Drug Task Force IT DTF Y N11 Emer Response Team IT ERT Y N
12 Law Scene of Action SOA P1 N N na na
13 Grand Rapids PD Admin GR PD Adm Y N 1 414 Bigfork Police Admin BF PD Adm Y N 2 415 Bovey Police Admin BV PD Adm Y N 1 416 Coleraine Police Admin CL PD Adm Y N 2 417 Deer River Police Admin DR PD Adm Y N 1 418 Keewatin Police Admin KW PD Adm Y N 2 419 Nashwauk Police Admin NW PD Adm Y N 1 4
Talk
grou
p Na
me
Talk
grou
p Al
ias
(ABB
R)
Trun
ked
Disp
atch
Fails
oft
Chan
nel
Talk
grou
p Pr
iorit
y
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
23
Fire amp EMS Talk Groups
Talkg
roup
Na
me
Talkg
roup
Alia
s (A
BBR)
Trun
ked
Disp
atch
Fails
oft
Chan
nel
Talkg
roup
Pr
iority
Itasca Co Fire 1 IT Fire 1 Y Y 3 2Itasca Co Fire 2 IT Fire 2 Y Y 4 2Itasca Co Fire 3 IT Fire 3 Y Y 3 3
Itasca Co Fire Tac IT Fire Tac Y Y 4 4
FireEMS Scene of Action SOAFIRE1 N N na na
Balsam Fire Admin BS FD Adm Y N 3 4Bigfork Fire Admin BF FD Adm Y N 4 4Bovey Fire Admin BV FD Adm Y N 3 4
Calumet Fire Admin CA FD Adm Y N 3 4Cohasset Fire Admin CH FD Adm Y N 4 4Coleraine Fire Admin CL FD Adm Y N 3 4Deer River Fire Admin DR FD Adm Y N 4 4Goodland Fire Admin GL FD Adm Y N 3 4
Grand Rapids Fire Admin GR FD Adm Y N 4 4Keewatin Fire Admin KW FD Adm Y N 3 4Marble Fire Admin MB FD Adm Y N 4 4
Nashwauk Fire Admin NW FD Adm Y N 3 4Squaw Lake Fire Admin SQ FD Adm Y N 4 4
Taconite Fire Admin TC FD Adm Y N 3 4WarbaFeelySago Fire Admin WFS FD Adm Y N 4 4
Fire VHF Mu Aid FD Muaid Y Y 3 3Itasca Co EMS 1 IT EMS (AMB) 1 Y Y 5 2Itasca Co EMS 2 IT EMS (AMB) 2 Y Y 6 2
Itasca Co EMS Tac IT EMS (AMB) Tac Y Y 3
FireEMS Scene of Action SOAFIRE2 N N na na
Bigfork Ambulance Admin BF AMB Adm Y N 5Buck Lake 1st Responders BL 1st AdmDeer River Ambulance Admin DR AMB Adm Y N 6
Meds1 Ambulance Admin M1 AMB Adm Y N 5Naswauk Ambulance Admin NW AMB Adm
Squaw Lake 1st Resp Admin SQ 1st Adm Y N 6
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
24
Questionshellipso far
25
Simulcast Transmitting Systems
Simulcast Transmitting is defined as bull A radio system where the same radio
frequencies are Simultaneously Broadcast from all tower sites within the radio system
bull This allows same radio frequencies to be used throughout the entire coverage area
26
Simulcast Transmitting Systems
Simulcast Benefitsbull Seamless communications throughout the radio
systemrsquos coverage areabull Improved radio frequency utilizationbull Improved coverage in areas with difficult
terrainbull Improved in-building coverage (signals in
overlap zones are ldquoadditiverdquo)
27
Simulcast Transmitting Systems
Simulcast ldquoconsrdquo bull Not inexpensive technologybull Tower site spacing is critical (especially when
using NPSPAC frequencies)bull Signal ldquotimingrdquo is critical between all sitesbull Tower site interconnection (microwave T1
etc) is also critical and can be expensive
28
Simulcast Transmitting Systems
Site 1Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
29
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
Kandiyohi Co MN ndash with Simulcast
30
31
ldquoSimulcastrdquo fills in where single site canrsquot
32
Simulcast Issues
bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality
33
Simulcast Issues
bull Slightly out of phase -ldquoGhostingrdquo on a TV set
bull Out-of-phase signals can cause destructive cancellation
bull Fully in-phase signals produce constructive composite signal
34
Discussion and questions regarding Simulcast transmission
techniques and issues
35
Multicast Transmitting Systems
Multicast Transmitting is defined as bull A radio system where different radio
frequencies are used at each tower site within the radio system
Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost
36
Multicast Transmitting Systems
Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its
own set of frequencies)bull No Simulcast coverage benefits (overlap
voting)bull Units ldquoroamrdquo between sites
37
f1 f2 f3 f4 f5
f6 f7 f8 f9 f10
Kandiyohi Co MN ndash with Multicast
38
ARMER System
In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link
Typical ARMER tower site is Multicast Typical Local Ehancement system is
Simulcast
39
Zone Controller
40
Radio System Modulation Technologies
bull Analog vs DigitalMost existing Public Safety radio
systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why
41
Modulation Techniques
Analog transmission
Digital transmission
Information is sent by changing the frequency amplitude or phase of the radio signal
Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)
42
Modulation Techniques
bull Digital Benefits Clearer audio throughout system coverage
area
Improved radio frequency efficiency
Improved system coverage
Imbedded signaling options
Encryption with no range loss
43
Voting Receiver Technology
In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site
In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip
hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip
hellipwhich may be stronger than the original signal
44
Voting Receiver Systems
Site 1
Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5f1 f2 f3 f4 f5
Comparator
Received audio to System
45
Discussionamp
Questions
Slide Number 1
Presentation Agenda
ldquoTrunking 101rdquo
What is ldquoTrunkingrdquo
Conventional vs Trunked
Slide Number 6
Slide Number 7
Your Bank Tellers ndash as ldquoConventionalrdquo
Conventional vs Trunked
Trunked Radio Systems
Conventional vs Trunked
Conventional vs Trunked
Basic Trunking Diagram
Your Bank Tellers ndash as ldquoTrunkedrdquo
Conventional vs Trunked
So How Does It Work
Control Channel continuously transmits system data to all radios
Radio user presses TX button and radio information is sent via control channel to Central Controller
Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
When transmission is completed all units revert back to Control Channel
Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
Fire amp EMS Talk Groups
Questionshellipso far
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Kandiyohi Co MN ndash with Simulcast
Slide Number 31
Simulcast Issues
Simulcast Issues
Discussion and questions regarding Simulcast transmission techniques and issues
Multicast Transmitting Systems
Multicast Transmitting Systems
Kandiyohi Co MN ndash with Multicast
ARMER System
Slide Number 39
Radio System Modulation Technologies
Modulation Techniques
Modulation Techniques
Voting Receiver Technology
Voting Receiver Systems
DiscussionampQuestions
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
18
Radio user presses TX button and radio information is sent via control channel to
Central Controller
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
19
Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios
selected on same Talk Group
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
FD
20
Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the
voice transmission
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
FD
21
When transmission is completed all units revert back to Control Channel
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
FD
22
Radio System Fleetmapping
Radio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo
(Law Enforcement shown here)
1 Itasca Co Law 1 IT Law 1 Y Y 1 22 Itasca Co Law 2 IT Law 2 Y Y 2 23 Itasca Co Law 3 IT Law 3 Y Y 1 34 Itasca Co Law Tac IT Law Tac Y Y 2 35 Itasca Co SO Admin IT SO Adm Y N 1 36 Itasca Co Srch amp Res IT S-R Y N 2 37 Itasca Co Probation IT Prob Y N 1 38 Itasca Co SO Jail IT SO Jail N na na9 Grand Rapids PD GR PD Ops Y Y 2 210 Drug Task Force IT DTF Y N11 Emer Response Team IT ERT Y N
12 Law Scene of Action SOA P1 N N na na
13 Grand Rapids PD Admin GR PD Adm Y N 1 414 Bigfork Police Admin BF PD Adm Y N 2 415 Bovey Police Admin BV PD Adm Y N 1 416 Coleraine Police Admin CL PD Adm Y N 2 417 Deer River Police Admin DR PD Adm Y N 1 418 Keewatin Police Admin KW PD Adm Y N 2 419 Nashwauk Police Admin NW PD Adm Y N 1 4
Talk
grou
p Na
me
Talk
grou
p Al
ias
(ABB
R)
Trun
ked
Disp
atch
Fails
oft
Chan
nel
Talk
grou
p Pr
iorit
y
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
23
Fire amp EMS Talk Groups
Talkg
roup
Na
me
Talkg
roup
Alia
s (A
BBR)
Trun
ked
Disp
atch
Fails
oft
Chan
nel
Talkg
roup
Pr
iority
Itasca Co Fire 1 IT Fire 1 Y Y 3 2Itasca Co Fire 2 IT Fire 2 Y Y 4 2Itasca Co Fire 3 IT Fire 3 Y Y 3 3
Itasca Co Fire Tac IT Fire Tac Y Y 4 4
FireEMS Scene of Action SOAFIRE1 N N na na
Balsam Fire Admin BS FD Adm Y N 3 4Bigfork Fire Admin BF FD Adm Y N 4 4Bovey Fire Admin BV FD Adm Y N 3 4
Calumet Fire Admin CA FD Adm Y N 3 4Cohasset Fire Admin CH FD Adm Y N 4 4Coleraine Fire Admin CL FD Adm Y N 3 4Deer River Fire Admin DR FD Adm Y N 4 4Goodland Fire Admin GL FD Adm Y N 3 4
Grand Rapids Fire Admin GR FD Adm Y N 4 4Keewatin Fire Admin KW FD Adm Y N 3 4Marble Fire Admin MB FD Adm Y N 4 4
Nashwauk Fire Admin NW FD Adm Y N 3 4Squaw Lake Fire Admin SQ FD Adm Y N 4 4
Taconite Fire Admin TC FD Adm Y N 3 4WarbaFeelySago Fire Admin WFS FD Adm Y N 4 4
Fire VHF Mu Aid FD Muaid Y Y 3 3Itasca Co EMS 1 IT EMS (AMB) 1 Y Y 5 2Itasca Co EMS 2 IT EMS (AMB) 2 Y Y 6 2
Itasca Co EMS Tac IT EMS (AMB) Tac Y Y 3
FireEMS Scene of Action SOAFIRE2 N N na na
Bigfork Ambulance Admin BF AMB Adm Y N 5Buck Lake 1st Responders BL 1st AdmDeer River Ambulance Admin DR AMB Adm Y N 6
Meds1 Ambulance Admin M1 AMB Adm Y N 5Naswauk Ambulance Admin NW AMB Adm
Squaw Lake 1st Resp Admin SQ 1st Adm Y N 6
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
24
Questionshellipso far
25
Simulcast Transmitting Systems
Simulcast Transmitting is defined as bull A radio system where the same radio
frequencies are Simultaneously Broadcast from all tower sites within the radio system
bull This allows same radio frequencies to be used throughout the entire coverage area
26
Simulcast Transmitting Systems
Simulcast Benefitsbull Seamless communications throughout the radio
systemrsquos coverage areabull Improved radio frequency utilizationbull Improved coverage in areas with difficult
terrainbull Improved in-building coverage (signals in
overlap zones are ldquoadditiverdquo)
27
Simulcast Transmitting Systems
Simulcast ldquoconsrdquo bull Not inexpensive technologybull Tower site spacing is critical (especially when
using NPSPAC frequencies)bull Signal ldquotimingrdquo is critical between all sitesbull Tower site interconnection (microwave T1
etc) is also critical and can be expensive
28
Simulcast Transmitting Systems
Site 1Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
29
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
Kandiyohi Co MN ndash with Simulcast
30
31
ldquoSimulcastrdquo fills in where single site canrsquot
32
Simulcast Issues
bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality
33
Simulcast Issues
bull Slightly out of phase -ldquoGhostingrdquo on a TV set
bull Out-of-phase signals can cause destructive cancellation
bull Fully in-phase signals produce constructive composite signal
34
Discussion and questions regarding Simulcast transmission
techniques and issues
35
Multicast Transmitting Systems
Multicast Transmitting is defined as bull A radio system where different radio
frequencies are used at each tower site within the radio system
Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost
36
Multicast Transmitting Systems
Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its
own set of frequencies)bull No Simulcast coverage benefits (overlap
voting)bull Units ldquoroamrdquo between sites
37
f1 f2 f3 f4 f5
f6 f7 f8 f9 f10
Kandiyohi Co MN ndash with Multicast
38
ARMER System
In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link
Typical ARMER tower site is Multicast Typical Local Ehancement system is
Simulcast
39
Zone Controller
40
Radio System Modulation Technologies
bull Analog vs DigitalMost existing Public Safety radio
systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why
41
Modulation Techniques
Analog transmission
Digital transmission
Information is sent by changing the frequency amplitude or phase of the radio signal
Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)
42
Modulation Techniques
bull Digital Benefits Clearer audio throughout system coverage
area
Improved radio frequency efficiency
Improved system coverage
Imbedded signaling options
Encryption with no range loss
43
Voting Receiver Technology
In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site
In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip
hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip
hellipwhich may be stronger than the original signal
44
Voting Receiver Systems
Site 1
Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5f1 f2 f3 f4 f5
Comparator
Received audio to System
45
Discussionamp
Questions
Slide Number 1
Presentation Agenda
ldquoTrunking 101rdquo
What is ldquoTrunkingrdquo
Conventional vs Trunked
Slide Number 6
Slide Number 7
Your Bank Tellers ndash as ldquoConventionalrdquo
Conventional vs Trunked
Trunked Radio Systems
Conventional vs Trunked
Conventional vs Trunked
Basic Trunking Diagram
Your Bank Tellers ndash as ldquoTrunkedrdquo
Conventional vs Trunked
So How Does It Work
Control Channel continuously transmits system data to all radios
Radio user presses TX button and radio information is sent via control channel to Central Controller
Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
When transmission is completed all units revert back to Control Channel
Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
Fire amp EMS Talk Groups
Questionshellipso far
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Kandiyohi Co MN ndash with Simulcast
Slide Number 31
Simulcast Issues
Simulcast Issues
Discussion and questions regarding Simulcast transmission techniques and issues
Multicast Transmitting Systems
Multicast Transmitting Systems
Kandiyohi Co MN ndash with Multicast
ARMER System
Slide Number 39
Radio System Modulation Technologies
Modulation Techniques
Modulation Techniques
Voting Receiver Technology
Voting Receiver Systems
DiscussionampQuestions
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
19
Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios
selected on same Talk Group
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
FD
20
Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the
voice transmission
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
FD
21
When transmission is completed all units revert back to Control Channel
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
FD
22
Radio System Fleetmapping
Radio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo
(Law Enforcement shown here)
1 Itasca Co Law 1 IT Law 1 Y Y 1 22 Itasca Co Law 2 IT Law 2 Y Y 2 23 Itasca Co Law 3 IT Law 3 Y Y 1 34 Itasca Co Law Tac IT Law Tac Y Y 2 35 Itasca Co SO Admin IT SO Adm Y N 1 36 Itasca Co Srch amp Res IT S-R Y N 2 37 Itasca Co Probation IT Prob Y N 1 38 Itasca Co SO Jail IT SO Jail N na na9 Grand Rapids PD GR PD Ops Y Y 2 210 Drug Task Force IT DTF Y N11 Emer Response Team IT ERT Y N
12 Law Scene of Action SOA P1 N N na na
13 Grand Rapids PD Admin GR PD Adm Y N 1 414 Bigfork Police Admin BF PD Adm Y N 2 415 Bovey Police Admin BV PD Adm Y N 1 416 Coleraine Police Admin CL PD Adm Y N 2 417 Deer River Police Admin DR PD Adm Y N 1 418 Keewatin Police Admin KW PD Adm Y N 2 419 Nashwauk Police Admin NW PD Adm Y N 1 4
Talk
grou
p Na
me
Talk
grou
p Al
ias
(ABB
R)
Trun
ked
Disp
atch
Fails
oft
Chan
nel
Talk
grou
p Pr
iorit
y
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
23
Fire amp EMS Talk Groups
Talkg
roup
Na
me
Talkg
roup
Alia
s (A
BBR)
Trun
ked
Disp
atch
Fails
oft
Chan
nel
Talkg
roup
Pr
iority
Itasca Co Fire 1 IT Fire 1 Y Y 3 2Itasca Co Fire 2 IT Fire 2 Y Y 4 2Itasca Co Fire 3 IT Fire 3 Y Y 3 3
Itasca Co Fire Tac IT Fire Tac Y Y 4 4
FireEMS Scene of Action SOAFIRE1 N N na na
Balsam Fire Admin BS FD Adm Y N 3 4Bigfork Fire Admin BF FD Adm Y N 4 4Bovey Fire Admin BV FD Adm Y N 3 4
Calumet Fire Admin CA FD Adm Y N 3 4Cohasset Fire Admin CH FD Adm Y N 4 4Coleraine Fire Admin CL FD Adm Y N 3 4Deer River Fire Admin DR FD Adm Y N 4 4Goodland Fire Admin GL FD Adm Y N 3 4
Grand Rapids Fire Admin GR FD Adm Y N 4 4Keewatin Fire Admin KW FD Adm Y N 3 4Marble Fire Admin MB FD Adm Y N 4 4
Nashwauk Fire Admin NW FD Adm Y N 3 4Squaw Lake Fire Admin SQ FD Adm Y N 4 4
Taconite Fire Admin TC FD Adm Y N 3 4WarbaFeelySago Fire Admin WFS FD Adm Y N 4 4
Fire VHF Mu Aid FD Muaid Y Y 3 3Itasca Co EMS 1 IT EMS (AMB) 1 Y Y 5 2Itasca Co EMS 2 IT EMS (AMB) 2 Y Y 6 2
Itasca Co EMS Tac IT EMS (AMB) Tac Y Y 3
FireEMS Scene of Action SOAFIRE2 N N na na
Bigfork Ambulance Admin BF AMB Adm Y N 5Buck Lake 1st Responders BL 1st AdmDeer River Ambulance Admin DR AMB Adm Y N 6
Meds1 Ambulance Admin M1 AMB Adm Y N 5Naswauk Ambulance Admin NW AMB Adm
Squaw Lake 1st Resp Admin SQ 1st Adm Y N 6
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
24
Questionshellipso far
25
Simulcast Transmitting Systems
Simulcast Transmitting is defined as bull A radio system where the same radio
frequencies are Simultaneously Broadcast from all tower sites within the radio system
bull This allows same radio frequencies to be used throughout the entire coverage area
26
Simulcast Transmitting Systems
Simulcast Benefitsbull Seamless communications throughout the radio
systemrsquos coverage areabull Improved radio frequency utilizationbull Improved coverage in areas with difficult
terrainbull Improved in-building coverage (signals in
overlap zones are ldquoadditiverdquo)
27
Simulcast Transmitting Systems
Simulcast ldquoconsrdquo bull Not inexpensive technologybull Tower site spacing is critical (especially when
using NPSPAC frequencies)bull Signal ldquotimingrdquo is critical between all sitesbull Tower site interconnection (microwave T1
etc) is also critical and can be expensive
28
Simulcast Transmitting Systems
Site 1Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
29
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
Kandiyohi Co MN ndash with Simulcast
30
31
ldquoSimulcastrdquo fills in where single site canrsquot
32
Simulcast Issues
bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality
33
Simulcast Issues
bull Slightly out of phase -ldquoGhostingrdquo on a TV set
bull Out-of-phase signals can cause destructive cancellation
bull Fully in-phase signals produce constructive composite signal
34
Discussion and questions regarding Simulcast transmission
techniques and issues
35
Multicast Transmitting Systems
Multicast Transmitting is defined as bull A radio system where different radio
frequencies are used at each tower site within the radio system
Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost
36
Multicast Transmitting Systems
Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its
own set of frequencies)bull No Simulcast coverage benefits (overlap
voting)bull Units ldquoroamrdquo between sites
37
f1 f2 f3 f4 f5
f6 f7 f8 f9 f10
Kandiyohi Co MN ndash with Multicast
38
ARMER System
In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link
Typical ARMER tower site is Multicast Typical Local Ehancement system is
Simulcast
39
Zone Controller
40
Radio System Modulation Technologies
bull Analog vs DigitalMost existing Public Safety radio
systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why
41
Modulation Techniques
Analog transmission
Digital transmission
Information is sent by changing the frequency amplitude or phase of the radio signal
Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)
42
Modulation Techniques
bull Digital Benefits Clearer audio throughout system coverage
area
Improved radio frequency efficiency
Improved system coverage
Imbedded signaling options
Encryption with no range loss
43
Voting Receiver Technology
In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site
In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip
hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip
hellipwhich may be stronger than the original signal
44
Voting Receiver Systems
Site 1
Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5f1 f2 f3 f4 f5
Comparator
Received audio to System
45
Discussionamp
Questions
Slide Number 1
Presentation Agenda
ldquoTrunking 101rdquo
What is ldquoTrunkingrdquo
Conventional vs Trunked
Slide Number 6
Slide Number 7
Your Bank Tellers ndash as ldquoConventionalrdquo
Conventional vs Trunked
Trunked Radio Systems
Conventional vs Trunked
Conventional vs Trunked
Basic Trunking Diagram
Your Bank Tellers ndash as ldquoTrunkedrdquo
Conventional vs Trunked
So How Does It Work
Control Channel continuously transmits system data to all radios
Radio user presses TX button and radio information is sent via control channel to Central Controller
Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
When transmission is completed all units revert back to Control Channel
Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
Fire amp EMS Talk Groups
Questionshellipso far
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Kandiyohi Co MN ndash with Simulcast
Slide Number 31
Simulcast Issues
Simulcast Issues
Discussion and questions regarding Simulcast transmission techniques and issues
Multicast Transmitting Systems
Multicast Transmitting Systems
Kandiyohi Co MN ndash with Multicast
ARMER System
Slide Number 39
Radio System Modulation Technologies
Modulation Techniques
Modulation Techniques
Voting Receiver Technology
Voting Receiver Systems
DiscussionampQuestions
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
20
Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the
voice transmission
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
FD
21
When transmission is completed all units revert back to Control Channel
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
FD
22
Radio System Fleetmapping
Radio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo
(Law Enforcement shown here)
1 Itasca Co Law 1 IT Law 1 Y Y 1 22 Itasca Co Law 2 IT Law 2 Y Y 2 23 Itasca Co Law 3 IT Law 3 Y Y 1 34 Itasca Co Law Tac IT Law Tac Y Y 2 35 Itasca Co SO Admin IT SO Adm Y N 1 36 Itasca Co Srch amp Res IT S-R Y N 2 37 Itasca Co Probation IT Prob Y N 1 38 Itasca Co SO Jail IT SO Jail N na na9 Grand Rapids PD GR PD Ops Y Y 2 210 Drug Task Force IT DTF Y N11 Emer Response Team IT ERT Y N
12 Law Scene of Action SOA P1 N N na na
13 Grand Rapids PD Admin GR PD Adm Y N 1 414 Bigfork Police Admin BF PD Adm Y N 2 415 Bovey Police Admin BV PD Adm Y N 1 416 Coleraine Police Admin CL PD Adm Y N 2 417 Deer River Police Admin DR PD Adm Y N 1 418 Keewatin Police Admin KW PD Adm Y N 2 419 Nashwauk Police Admin NW PD Adm Y N 1 4
Talk
grou
p Na
me
Talk
grou
p Al
ias
(ABB
R)
Trun
ked
Disp
atch
Fails
oft
Chan
nel
Talk
grou
p Pr
iorit
y
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
23
Fire amp EMS Talk Groups
Talkg
roup
Na
me
Talkg
roup
Alia
s (A
BBR)
Trun
ked
Disp
atch
Fails
oft
Chan
nel
Talkg
roup
Pr
iority
Itasca Co Fire 1 IT Fire 1 Y Y 3 2Itasca Co Fire 2 IT Fire 2 Y Y 4 2Itasca Co Fire 3 IT Fire 3 Y Y 3 3
Itasca Co Fire Tac IT Fire Tac Y Y 4 4
FireEMS Scene of Action SOAFIRE1 N N na na
Balsam Fire Admin BS FD Adm Y N 3 4Bigfork Fire Admin BF FD Adm Y N 4 4Bovey Fire Admin BV FD Adm Y N 3 4
Calumet Fire Admin CA FD Adm Y N 3 4Cohasset Fire Admin CH FD Adm Y N 4 4Coleraine Fire Admin CL FD Adm Y N 3 4Deer River Fire Admin DR FD Adm Y N 4 4Goodland Fire Admin GL FD Adm Y N 3 4
Grand Rapids Fire Admin GR FD Adm Y N 4 4Keewatin Fire Admin KW FD Adm Y N 3 4Marble Fire Admin MB FD Adm Y N 4 4
Nashwauk Fire Admin NW FD Adm Y N 3 4Squaw Lake Fire Admin SQ FD Adm Y N 4 4
Taconite Fire Admin TC FD Adm Y N 3 4WarbaFeelySago Fire Admin WFS FD Adm Y N 4 4
Fire VHF Mu Aid FD Muaid Y Y 3 3Itasca Co EMS 1 IT EMS (AMB) 1 Y Y 5 2Itasca Co EMS 2 IT EMS (AMB) 2 Y Y 6 2
Itasca Co EMS Tac IT EMS (AMB) Tac Y Y 3
FireEMS Scene of Action SOAFIRE2 N N na na
Bigfork Ambulance Admin BF AMB Adm Y N 5Buck Lake 1st Responders BL 1st AdmDeer River Ambulance Admin DR AMB Adm Y N 6
Meds1 Ambulance Admin M1 AMB Adm Y N 5Naswauk Ambulance Admin NW AMB Adm
Squaw Lake 1st Resp Admin SQ 1st Adm Y N 6
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
24
Questionshellipso far
25
Simulcast Transmitting Systems
Simulcast Transmitting is defined as bull A radio system where the same radio
frequencies are Simultaneously Broadcast from all tower sites within the radio system
bull This allows same radio frequencies to be used throughout the entire coverage area
26
Simulcast Transmitting Systems
Simulcast Benefitsbull Seamless communications throughout the radio
systemrsquos coverage areabull Improved radio frequency utilizationbull Improved coverage in areas with difficult
terrainbull Improved in-building coverage (signals in
overlap zones are ldquoadditiverdquo)
27
Simulcast Transmitting Systems
Simulcast ldquoconsrdquo bull Not inexpensive technologybull Tower site spacing is critical (especially when
using NPSPAC frequencies)bull Signal ldquotimingrdquo is critical between all sitesbull Tower site interconnection (microwave T1
etc) is also critical and can be expensive
28
Simulcast Transmitting Systems
Site 1Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
29
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
Kandiyohi Co MN ndash with Simulcast
30
31
ldquoSimulcastrdquo fills in where single site canrsquot
32
Simulcast Issues
bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality
33
Simulcast Issues
bull Slightly out of phase -ldquoGhostingrdquo on a TV set
bull Out-of-phase signals can cause destructive cancellation
bull Fully in-phase signals produce constructive composite signal
34
Discussion and questions regarding Simulcast transmission
techniques and issues
35
Multicast Transmitting Systems
Multicast Transmitting is defined as bull A radio system where different radio
frequencies are used at each tower site within the radio system
Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost
36
Multicast Transmitting Systems
Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its
own set of frequencies)bull No Simulcast coverage benefits (overlap
voting)bull Units ldquoroamrdquo between sites
37
f1 f2 f3 f4 f5
f6 f7 f8 f9 f10
Kandiyohi Co MN ndash with Multicast
38
ARMER System
In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link
Typical ARMER tower site is Multicast Typical Local Ehancement system is
Simulcast
39
Zone Controller
40
Radio System Modulation Technologies
bull Analog vs DigitalMost existing Public Safety radio
systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why
41
Modulation Techniques
Analog transmission
Digital transmission
Information is sent by changing the frequency amplitude or phase of the radio signal
Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)
42
Modulation Techniques
bull Digital Benefits Clearer audio throughout system coverage
area
Improved radio frequency efficiency
Improved system coverage
Imbedded signaling options
Encryption with no range loss
43
Voting Receiver Technology
In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site
In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip
hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip
hellipwhich may be stronger than the original signal
44
Voting Receiver Systems
Site 1
Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5f1 f2 f3 f4 f5
Comparator
Received audio to System
45
Discussionamp
Questions
Slide Number 1
Presentation Agenda
ldquoTrunking 101rdquo
What is ldquoTrunkingrdquo
Conventional vs Trunked
Slide Number 6
Slide Number 7
Your Bank Tellers ndash as ldquoConventionalrdquo
Conventional vs Trunked
Trunked Radio Systems
Conventional vs Trunked
Conventional vs Trunked
Basic Trunking Diagram
Your Bank Tellers ndash as ldquoTrunkedrdquo
Conventional vs Trunked
So How Does It Work
Control Channel continuously transmits system data to all radios
Radio user presses TX button and radio information is sent via control channel to Central Controller
Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
When transmission is completed all units revert back to Control Channel
Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
Fire amp EMS Talk Groups
Questionshellipso far
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Kandiyohi Co MN ndash with Simulcast
Slide Number 31
Simulcast Issues
Simulcast Issues
Discussion and questions regarding Simulcast transmission techniques and issues
Multicast Transmitting Systems
Multicast Transmitting Systems
Kandiyohi Co MN ndash with Multicast
ARMER System
Slide Number 39
Radio System Modulation Technologies
Modulation Techniques
Modulation Techniques
Voting Receiver Technology
Voting Receiver Systems
DiscussionampQuestions
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
21
When transmission is completed all units revert back to Control Channel
CH 1
CentralController
TX RX
CH 2RXTX
CH 3RXTX
CH 4RXTX
CH 28RXTX
ControlChannel
FD
FD
22
Radio System Fleetmapping
Radio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo
(Law Enforcement shown here)
1 Itasca Co Law 1 IT Law 1 Y Y 1 22 Itasca Co Law 2 IT Law 2 Y Y 2 23 Itasca Co Law 3 IT Law 3 Y Y 1 34 Itasca Co Law Tac IT Law Tac Y Y 2 35 Itasca Co SO Admin IT SO Adm Y N 1 36 Itasca Co Srch amp Res IT S-R Y N 2 37 Itasca Co Probation IT Prob Y N 1 38 Itasca Co SO Jail IT SO Jail N na na9 Grand Rapids PD GR PD Ops Y Y 2 210 Drug Task Force IT DTF Y N11 Emer Response Team IT ERT Y N
12 Law Scene of Action SOA P1 N N na na
13 Grand Rapids PD Admin GR PD Adm Y N 1 414 Bigfork Police Admin BF PD Adm Y N 2 415 Bovey Police Admin BV PD Adm Y N 1 416 Coleraine Police Admin CL PD Adm Y N 2 417 Deer River Police Admin DR PD Adm Y N 1 418 Keewatin Police Admin KW PD Adm Y N 2 419 Nashwauk Police Admin NW PD Adm Y N 1 4
Talk
grou
p Na
me
Talk
grou
p Al
ias
(ABB
R)
Trun
ked
Disp
atch
Fails
oft
Chan
nel
Talk
grou
p Pr
iorit
y
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
23
Fire amp EMS Talk Groups
Talkg
roup
Na
me
Talkg
roup
Alia
s (A
BBR)
Trun
ked
Disp
atch
Fails
oft
Chan
nel
Talkg
roup
Pr
iority
Itasca Co Fire 1 IT Fire 1 Y Y 3 2Itasca Co Fire 2 IT Fire 2 Y Y 4 2Itasca Co Fire 3 IT Fire 3 Y Y 3 3
Itasca Co Fire Tac IT Fire Tac Y Y 4 4
FireEMS Scene of Action SOAFIRE1 N N na na
Balsam Fire Admin BS FD Adm Y N 3 4Bigfork Fire Admin BF FD Adm Y N 4 4Bovey Fire Admin BV FD Adm Y N 3 4
Calumet Fire Admin CA FD Adm Y N 3 4Cohasset Fire Admin CH FD Adm Y N 4 4Coleraine Fire Admin CL FD Adm Y N 3 4Deer River Fire Admin DR FD Adm Y N 4 4Goodland Fire Admin GL FD Adm Y N 3 4
Grand Rapids Fire Admin GR FD Adm Y N 4 4Keewatin Fire Admin KW FD Adm Y N 3 4Marble Fire Admin MB FD Adm Y N 4 4
Nashwauk Fire Admin NW FD Adm Y N 3 4Squaw Lake Fire Admin SQ FD Adm Y N 4 4
Taconite Fire Admin TC FD Adm Y N 3 4WarbaFeelySago Fire Admin WFS FD Adm Y N 4 4
Fire VHF Mu Aid FD Muaid Y Y 3 3Itasca Co EMS 1 IT EMS (AMB) 1 Y Y 5 2Itasca Co EMS 2 IT EMS (AMB) 2 Y Y 6 2
Itasca Co EMS Tac IT EMS (AMB) Tac Y Y 3
FireEMS Scene of Action SOAFIRE2 N N na na
Bigfork Ambulance Admin BF AMB Adm Y N 5Buck Lake 1st Responders BL 1st AdmDeer River Ambulance Admin DR AMB Adm Y N 6
Meds1 Ambulance Admin M1 AMB Adm Y N 5Naswauk Ambulance Admin NW AMB Adm
Squaw Lake 1st Resp Admin SQ 1st Adm Y N 6
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
24
Questionshellipso far
25
Simulcast Transmitting Systems
Simulcast Transmitting is defined as bull A radio system where the same radio
frequencies are Simultaneously Broadcast from all tower sites within the radio system
bull This allows same radio frequencies to be used throughout the entire coverage area
26
Simulcast Transmitting Systems
Simulcast Benefitsbull Seamless communications throughout the radio
systemrsquos coverage areabull Improved radio frequency utilizationbull Improved coverage in areas with difficult
terrainbull Improved in-building coverage (signals in
overlap zones are ldquoadditiverdquo)
27
Simulcast Transmitting Systems
Simulcast ldquoconsrdquo bull Not inexpensive technologybull Tower site spacing is critical (especially when
using NPSPAC frequencies)bull Signal ldquotimingrdquo is critical between all sitesbull Tower site interconnection (microwave T1
etc) is also critical and can be expensive
28
Simulcast Transmitting Systems
Site 1Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
29
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
Kandiyohi Co MN ndash with Simulcast
30
31
ldquoSimulcastrdquo fills in where single site canrsquot
32
Simulcast Issues
bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality
33
Simulcast Issues
bull Slightly out of phase -ldquoGhostingrdquo on a TV set
bull Out-of-phase signals can cause destructive cancellation
bull Fully in-phase signals produce constructive composite signal
34
Discussion and questions regarding Simulcast transmission
techniques and issues
35
Multicast Transmitting Systems
Multicast Transmitting is defined as bull A radio system where different radio
frequencies are used at each tower site within the radio system
Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost
36
Multicast Transmitting Systems
Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its
own set of frequencies)bull No Simulcast coverage benefits (overlap
voting)bull Units ldquoroamrdquo between sites
37
f1 f2 f3 f4 f5
f6 f7 f8 f9 f10
Kandiyohi Co MN ndash with Multicast
38
ARMER System
In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link
Typical ARMER tower site is Multicast Typical Local Ehancement system is
Simulcast
39
Zone Controller
40
Radio System Modulation Technologies
bull Analog vs DigitalMost existing Public Safety radio
systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why
41
Modulation Techniques
Analog transmission
Digital transmission
Information is sent by changing the frequency amplitude or phase of the radio signal
Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)
42
Modulation Techniques
bull Digital Benefits Clearer audio throughout system coverage
area
Improved radio frequency efficiency
Improved system coverage
Imbedded signaling options
Encryption with no range loss
43
Voting Receiver Technology
In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site
In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip
hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip
hellipwhich may be stronger than the original signal
44
Voting Receiver Systems
Site 1
Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5f1 f2 f3 f4 f5
Comparator
Received audio to System
45
Discussionamp
Questions
Slide Number 1
Presentation Agenda
ldquoTrunking 101rdquo
What is ldquoTrunkingrdquo
Conventional vs Trunked
Slide Number 6
Slide Number 7
Your Bank Tellers ndash as ldquoConventionalrdquo
Conventional vs Trunked
Trunked Radio Systems
Conventional vs Trunked
Conventional vs Trunked
Basic Trunking Diagram
Your Bank Tellers ndash as ldquoTrunkedrdquo
Conventional vs Trunked
So How Does It Work
Control Channel continuously transmits system data to all radios
Radio user presses TX button and radio information is sent via control channel to Central Controller
Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
When transmission is completed all units revert back to Control Channel
Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
Fire amp EMS Talk Groups
Questionshellipso far
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Kandiyohi Co MN ndash with Simulcast
Slide Number 31
Simulcast Issues
Simulcast Issues
Discussion and questions regarding Simulcast transmission techniques and issues
Multicast Transmitting Systems
Multicast Transmitting Systems
Kandiyohi Co MN ndash with Multicast
ARMER System
Slide Number 39
Radio System Modulation Technologies
Modulation Techniques
Modulation Techniques
Voting Receiver Technology
Voting Receiver Systems
DiscussionampQuestions
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
22
Radio System Fleetmapping
Radio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo
(Law Enforcement shown here)
1 Itasca Co Law 1 IT Law 1 Y Y 1 22 Itasca Co Law 2 IT Law 2 Y Y 2 23 Itasca Co Law 3 IT Law 3 Y Y 1 34 Itasca Co Law Tac IT Law Tac Y Y 2 35 Itasca Co SO Admin IT SO Adm Y N 1 36 Itasca Co Srch amp Res IT S-R Y N 2 37 Itasca Co Probation IT Prob Y N 1 38 Itasca Co SO Jail IT SO Jail N na na9 Grand Rapids PD GR PD Ops Y Y 2 210 Drug Task Force IT DTF Y N11 Emer Response Team IT ERT Y N
12 Law Scene of Action SOA P1 N N na na
13 Grand Rapids PD Admin GR PD Adm Y N 1 414 Bigfork Police Admin BF PD Adm Y N 2 415 Bovey Police Admin BV PD Adm Y N 1 416 Coleraine Police Admin CL PD Adm Y N 2 417 Deer River Police Admin DR PD Adm Y N 1 418 Keewatin Police Admin KW PD Adm Y N 2 419 Nashwauk Police Admin NW PD Adm Y N 1 4
Talk
grou
p Na
me
Talk
grou
p Al
ias
(ABB
R)
Trun
ked
Disp
atch
Fails
oft
Chan
nel
Talk
grou
p Pr
iorit
y
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
23
Fire amp EMS Talk Groups
Talkg
roup
Na
me
Talkg
roup
Alia
s (A
BBR)
Trun
ked
Disp
atch
Fails
oft
Chan
nel
Talkg
roup
Pr
iority
Itasca Co Fire 1 IT Fire 1 Y Y 3 2Itasca Co Fire 2 IT Fire 2 Y Y 4 2Itasca Co Fire 3 IT Fire 3 Y Y 3 3
Itasca Co Fire Tac IT Fire Tac Y Y 4 4
FireEMS Scene of Action SOAFIRE1 N N na na
Balsam Fire Admin BS FD Adm Y N 3 4Bigfork Fire Admin BF FD Adm Y N 4 4Bovey Fire Admin BV FD Adm Y N 3 4
Calumet Fire Admin CA FD Adm Y N 3 4Cohasset Fire Admin CH FD Adm Y N 4 4Coleraine Fire Admin CL FD Adm Y N 3 4Deer River Fire Admin DR FD Adm Y N 4 4Goodland Fire Admin GL FD Adm Y N 3 4
Grand Rapids Fire Admin GR FD Adm Y N 4 4Keewatin Fire Admin KW FD Adm Y N 3 4Marble Fire Admin MB FD Adm Y N 4 4
Nashwauk Fire Admin NW FD Adm Y N 3 4Squaw Lake Fire Admin SQ FD Adm Y N 4 4
Taconite Fire Admin TC FD Adm Y N 3 4WarbaFeelySago Fire Admin WFS FD Adm Y N 4 4
Fire VHF Mu Aid FD Muaid Y Y 3 3Itasca Co EMS 1 IT EMS (AMB) 1 Y Y 5 2Itasca Co EMS 2 IT EMS (AMB) 2 Y Y 6 2
Itasca Co EMS Tac IT EMS (AMB) Tac Y Y 3
FireEMS Scene of Action SOAFIRE2 N N na na
Bigfork Ambulance Admin BF AMB Adm Y N 5Buck Lake 1st Responders BL 1st AdmDeer River Ambulance Admin DR AMB Adm Y N 6
Meds1 Ambulance Admin M1 AMB Adm Y N 5Naswauk Ambulance Admin NW AMB Adm
Squaw Lake 1st Resp Admin SQ 1st Adm Y N 6
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
24
Questionshellipso far
25
Simulcast Transmitting Systems
Simulcast Transmitting is defined as bull A radio system where the same radio
frequencies are Simultaneously Broadcast from all tower sites within the radio system
bull This allows same radio frequencies to be used throughout the entire coverage area
26
Simulcast Transmitting Systems
Simulcast Benefitsbull Seamless communications throughout the radio
systemrsquos coverage areabull Improved radio frequency utilizationbull Improved coverage in areas with difficult
terrainbull Improved in-building coverage (signals in
overlap zones are ldquoadditiverdquo)
27
Simulcast Transmitting Systems
Simulcast ldquoconsrdquo bull Not inexpensive technologybull Tower site spacing is critical (especially when
using NPSPAC frequencies)bull Signal ldquotimingrdquo is critical between all sitesbull Tower site interconnection (microwave T1
etc) is also critical and can be expensive
28
Simulcast Transmitting Systems
Site 1Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
29
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
Kandiyohi Co MN ndash with Simulcast
30
31
ldquoSimulcastrdquo fills in where single site canrsquot
32
Simulcast Issues
bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality
33
Simulcast Issues
bull Slightly out of phase -ldquoGhostingrdquo on a TV set
bull Out-of-phase signals can cause destructive cancellation
bull Fully in-phase signals produce constructive composite signal
34
Discussion and questions regarding Simulcast transmission
techniques and issues
35
Multicast Transmitting Systems
Multicast Transmitting is defined as bull A radio system where different radio
frequencies are used at each tower site within the radio system
Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost
36
Multicast Transmitting Systems
Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its
own set of frequencies)bull No Simulcast coverage benefits (overlap
voting)bull Units ldquoroamrdquo between sites
37
f1 f2 f3 f4 f5
f6 f7 f8 f9 f10
Kandiyohi Co MN ndash with Multicast
38
ARMER System
In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link
Typical ARMER tower site is Multicast Typical Local Ehancement system is
Simulcast
39
Zone Controller
40
Radio System Modulation Technologies
bull Analog vs DigitalMost existing Public Safety radio
systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why
41
Modulation Techniques
Analog transmission
Digital transmission
Information is sent by changing the frequency amplitude or phase of the radio signal
Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)
42
Modulation Techniques
bull Digital Benefits Clearer audio throughout system coverage
area
Improved radio frequency efficiency
Improved system coverage
Imbedded signaling options
Encryption with no range loss
43
Voting Receiver Technology
In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site
In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip
hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip
hellipwhich may be stronger than the original signal
44
Voting Receiver Systems
Site 1
Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5f1 f2 f3 f4 f5
Comparator
Received audio to System
45
Discussionamp
Questions
Slide Number 1
Presentation Agenda
ldquoTrunking 101rdquo
What is ldquoTrunkingrdquo
Conventional vs Trunked
Slide Number 6
Slide Number 7
Your Bank Tellers ndash as ldquoConventionalrdquo
Conventional vs Trunked
Trunked Radio Systems
Conventional vs Trunked
Conventional vs Trunked
Basic Trunking Diagram
Your Bank Tellers ndash as ldquoTrunkedrdquo
Conventional vs Trunked
So How Does It Work
Control Channel continuously transmits system data to all radios
Radio user presses TX button and radio information is sent via control channel to Central Controller
Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
When transmission is completed all units revert back to Control Channel
Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
Fire amp EMS Talk Groups
Questionshellipso far
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Kandiyohi Co MN ndash with Simulcast
Slide Number 31
Simulcast Issues
Simulcast Issues
Discussion and questions regarding Simulcast transmission techniques and issues
Multicast Transmitting Systems
Multicast Transmitting Systems
Kandiyohi Co MN ndash with Multicast
ARMER System
Slide Number 39
Radio System Modulation Technologies
Modulation Techniques
Modulation Techniques
Voting Receiver Technology
Voting Receiver Systems
DiscussionampQuestions
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
23
Fire amp EMS Talk Groups
Talkg
roup
Na
me
Talkg
roup
Alia
s (A
BBR)
Trun
ked
Disp
atch
Fails
oft
Chan
nel
Talkg
roup
Pr
iority
Itasca Co Fire 1 IT Fire 1 Y Y 3 2Itasca Co Fire 2 IT Fire 2 Y Y 4 2Itasca Co Fire 3 IT Fire 3 Y Y 3 3
Itasca Co Fire Tac IT Fire Tac Y Y 4 4
FireEMS Scene of Action SOAFIRE1 N N na na
Balsam Fire Admin BS FD Adm Y N 3 4Bigfork Fire Admin BF FD Adm Y N 4 4Bovey Fire Admin BV FD Adm Y N 3 4
Calumet Fire Admin CA FD Adm Y N 3 4Cohasset Fire Admin CH FD Adm Y N 4 4Coleraine Fire Admin CL FD Adm Y N 3 4Deer River Fire Admin DR FD Adm Y N 4 4Goodland Fire Admin GL FD Adm Y N 3 4
Grand Rapids Fire Admin GR FD Adm Y N 4 4Keewatin Fire Admin KW FD Adm Y N 3 4Marble Fire Admin MB FD Adm Y N 4 4
Nashwauk Fire Admin NW FD Adm Y N 3 4Squaw Lake Fire Admin SQ FD Adm Y N 4 4
Taconite Fire Admin TC FD Adm Y N 3 4WarbaFeelySago Fire Admin WFS FD Adm Y N 4 4
Fire VHF Mu Aid FD Muaid Y Y 3 3Itasca Co EMS 1 IT EMS (AMB) 1 Y Y 5 2Itasca Co EMS 2 IT EMS (AMB) 2 Y Y 6 2
Itasca Co EMS Tac IT EMS (AMB) Tac Y Y 3
FireEMS Scene of Action SOAFIRE2 N N na na
Bigfork Ambulance Admin BF AMB Adm Y N 5Buck Lake 1st Responders BL 1st AdmDeer River Ambulance Admin DR AMB Adm Y N 6
Meds1 Ambulance Admin M1 AMB Adm Y N 5Naswauk Ambulance Admin NW AMB Adm
Squaw Lake 1st Resp Admin SQ 1st Adm Y N 6
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
24
Questionshellipso far
25
Simulcast Transmitting Systems
Simulcast Transmitting is defined as bull A radio system where the same radio
frequencies are Simultaneously Broadcast from all tower sites within the radio system
bull This allows same radio frequencies to be used throughout the entire coverage area
26
Simulcast Transmitting Systems
Simulcast Benefitsbull Seamless communications throughout the radio
systemrsquos coverage areabull Improved radio frequency utilizationbull Improved coverage in areas with difficult
terrainbull Improved in-building coverage (signals in
overlap zones are ldquoadditiverdquo)
27
Simulcast Transmitting Systems
Simulcast ldquoconsrdquo bull Not inexpensive technologybull Tower site spacing is critical (especially when
using NPSPAC frequencies)bull Signal ldquotimingrdquo is critical between all sitesbull Tower site interconnection (microwave T1
etc) is also critical and can be expensive
28
Simulcast Transmitting Systems
Site 1Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
29
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
Kandiyohi Co MN ndash with Simulcast
30
31
ldquoSimulcastrdquo fills in where single site canrsquot
32
Simulcast Issues
bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality
33
Simulcast Issues
bull Slightly out of phase -ldquoGhostingrdquo on a TV set
bull Out-of-phase signals can cause destructive cancellation
bull Fully in-phase signals produce constructive composite signal
34
Discussion and questions regarding Simulcast transmission
techniques and issues
35
Multicast Transmitting Systems
Multicast Transmitting is defined as bull A radio system where different radio
frequencies are used at each tower site within the radio system
Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost
36
Multicast Transmitting Systems
Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its
own set of frequencies)bull No Simulcast coverage benefits (overlap
voting)bull Units ldquoroamrdquo between sites
37
f1 f2 f3 f4 f5
f6 f7 f8 f9 f10
Kandiyohi Co MN ndash with Multicast
38
ARMER System
In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link
Typical ARMER tower site is Multicast Typical Local Ehancement system is
Simulcast
39
Zone Controller
40
Radio System Modulation Technologies
bull Analog vs DigitalMost existing Public Safety radio
systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why
41
Modulation Techniques
Analog transmission
Digital transmission
Information is sent by changing the frequency amplitude or phase of the radio signal
Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)
42
Modulation Techniques
bull Digital Benefits Clearer audio throughout system coverage
area
Improved radio frequency efficiency
Improved system coverage
Imbedded signaling options
Encryption with no range loss
43
Voting Receiver Technology
In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site
In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip
hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip
hellipwhich may be stronger than the original signal
44
Voting Receiver Systems
Site 1
Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5f1 f2 f3 f4 f5
Comparator
Received audio to System
45
Discussionamp
Questions
Slide Number 1
Presentation Agenda
ldquoTrunking 101rdquo
What is ldquoTrunkingrdquo
Conventional vs Trunked
Slide Number 6
Slide Number 7
Your Bank Tellers ndash as ldquoConventionalrdquo
Conventional vs Trunked
Trunked Radio Systems
Conventional vs Trunked
Conventional vs Trunked
Basic Trunking Diagram
Your Bank Tellers ndash as ldquoTrunkedrdquo
Conventional vs Trunked
So How Does It Work
Control Channel continuously transmits system data to all radios
Radio user presses TX button and radio information is sent via control channel to Central Controller
Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
When transmission is completed all units revert back to Control Channel
Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
Fire amp EMS Talk Groups
Questionshellipso far
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Kandiyohi Co MN ndash with Simulcast
Slide Number 31
Simulcast Issues
Simulcast Issues
Discussion and questions regarding Simulcast transmission techniques and issues
Multicast Transmitting Systems
Multicast Transmitting Systems
Kandiyohi Co MN ndash with Multicast
ARMER System
Slide Number 39
Radio System Modulation Technologies
Modulation Techniques
Modulation Techniques
Voting Receiver Technology
Voting Receiver Systems
DiscussionampQuestions
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
23
Fire amp EMS Talk Groups
Talkg
roup
Na
me
Talkg
roup
Alia
s (A
BBR)
Trun
ked
Disp
atch
Fails
oft
Chan
nel
Talkg
roup
Pr
iority
Itasca Co Fire 1 IT Fire 1 Y Y 3 2Itasca Co Fire 2 IT Fire 2 Y Y 4 2Itasca Co Fire 3 IT Fire 3 Y Y 3 3
Itasca Co Fire Tac IT Fire Tac Y Y 4 4
FireEMS Scene of Action SOAFIRE1 N N na na
Balsam Fire Admin BS FD Adm Y N 3 4Bigfork Fire Admin BF FD Adm Y N 4 4Bovey Fire Admin BV FD Adm Y N 3 4
Calumet Fire Admin CA FD Adm Y N 3 4Cohasset Fire Admin CH FD Adm Y N 4 4Coleraine Fire Admin CL FD Adm Y N 3 4Deer River Fire Admin DR FD Adm Y N 4 4Goodland Fire Admin GL FD Adm Y N 3 4
Grand Rapids Fire Admin GR FD Adm Y N 4 4Keewatin Fire Admin KW FD Adm Y N 3 4Marble Fire Admin MB FD Adm Y N 4 4
Nashwauk Fire Admin NW FD Adm Y N 3 4Squaw Lake Fire Admin SQ FD Adm Y N 4 4
Taconite Fire Admin TC FD Adm Y N 3 4WarbaFeelySago Fire Admin WFS FD Adm Y N 4 4
Fire VHF Mu Aid FD Muaid Y Y 3 3Itasca Co EMS 1 IT EMS (AMB) 1 Y Y 5 2Itasca Co EMS 2 IT EMS (AMB) 2 Y Y 6 2
Itasca Co EMS Tac IT EMS (AMB) Tac Y Y 3
FireEMS Scene of Action SOAFIRE2 N N na na
Bigfork Ambulance Admin BF AMB Adm Y N 5Buck Lake 1st Responders BL 1st AdmDeer River Ambulance Admin DR AMB Adm Y N 6
Meds1 Ambulance Admin M1 AMB Adm Y N 5Naswauk Ambulance Admin NW AMB Adm
Squaw Lake 1st Resp Admin SQ 1st Adm Y N 6
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
24
Questionshellipso far
25
Simulcast Transmitting Systems
Simulcast Transmitting is defined as bull A radio system where the same radio
frequencies are Simultaneously Broadcast from all tower sites within the radio system
bull This allows same radio frequencies to be used throughout the entire coverage area
26
Simulcast Transmitting Systems
Simulcast Benefitsbull Seamless communications throughout the radio
systemrsquos coverage areabull Improved radio frequency utilizationbull Improved coverage in areas with difficult
terrainbull Improved in-building coverage (signals in
overlap zones are ldquoadditiverdquo)
27
Simulcast Transmitting Systems
Simulcast ldquoconsrdquo bull Not inexpensive technologybull Tower site spacing is critical (especially when
using NPSPAC frequencies)bull Signal ldquotimingrdquo is critical between all sitesbull Tower site interconnection (microwave T1
etc) is also critical and can be expensive
28
Simulcast Transmitting Systems
Site 1Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
29
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
Kandiyohi Co MN ndash with Simulcast
30
31
ldquoSimulcastrdquo fills in where single site canrsquot
32
Simulcast Issues
bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality
33
Simulcast Issues
bull Slightly out of phase -ldquoGhostingrdquo on a TV set
bull Out-of-phase signals can cause destructive cancellation
bull Fully in-phase signals produce constructive composite signal
34
Discussion and questions regarding Simulcast transmission
techniques and issues
35
Multicast Transmitting Systems
Multicast Transmitting is defined as bull A radio system where different radio
frequencies are used at each tower site within the radio system
Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost
36
Multicast Transmitting Systems
Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its
own set of frequencies)bull No Simulcast coverage benefits (overlap
voting)bull Units ldquoroamrdquo between sites
37
f1 f2 f3 f4 f5
f6 f7 f8 f9 f10
Kandiyohi Co MN ndash with Multicast
38
ARMER System
In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link
Typical ARMER tower site is Multicast Typical Local Ehancement system is
Simulcast
39
Zone Controller
40
Radio System Modulation Technologies
bull Analog vs DigitalMost existing Public Safety radio
systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why
41
Modulation Techniques
Analog transmission
Digital transmission
Information is sent by changing the frequency amplitude or phase of the radio signal
Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)
42
Modulation Techniques
bull Digital Benefits Clearer audio throughout system coverage
area
Improved radio frequency efficiency
Improved system coverage
Imbedded signaling options
Encryption with no range loss
43
Voting Receiver Technology
In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site
In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip
hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip
hellipwhich may be stronger than the original signal
44
Voting Receiver Systems
Site 1
Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5f1 f2 f3 f4 f5
Comparator
Received audio to System
45
Discussionamp
Questions
Slide Number 1
Presentation Agenda
ldquoTrunking 101rdquo
What is ldquoTrunkingrdquo
Conventional vs Trunked
Slide Number 6
Slide Number 7
Your Bank Tellers ndash as ldquoConventionalrdquo
Conventional vs Trunked
Trunked Radio Systems
Conventional vs Trunked
Conventional vs Trunked
Basic Trunking Diagram
Your Bank Tellers ndash as ldquoTrunkedrdquo
Conventional vs Trunked
So How Does It Work
Control Channel continuously transmits system data to all radios
Radio user presses TX button and radio information is sent via control channel to Central Controller
Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
When transmission is completed all units revert back to Control Channel
Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
Fire amp EMS Talk Groups
Questionshellipso far
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Kandiyohi Co MN ndash with Simulcast
Slide Number 31
Simulcast Issues
Simulcast Issues
Discussion and questions regarding Simulcast transmission techniques and issues
Multicast Transmitting Systems
Multicast Transmitting Systems
Kandiyohi Co MN ndash with Multicast
ARMER System
Slide Number 39
Radio System Modulation Technologies
Modulation Techniques
Modulation Techniques
Voting Receiver Technology
Voting Receiver Systems
DiscussionampQuestions
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
23
Fire amp EMS Talk Groups
Talkg
roup
Na
me
Talkg
roup
Alia
s (A
BBR)
Trun
ked
Disp
atch
Fails
oft
Chan
nel
Talkg
roup
Pr
iority
Itasca Co Fire 1 IT Fire 1 Y Y 3 2Itasca Co Fire 2 IT Fire 2 Y Y 4 2Itasca Co Fire 3 IT Fire 3 Y Y 3 3
Itasca Co Fire Tac IT Fire Tac Y Y 4 4
FireEMS Scene of Action SOAFIRE1 N N na na
Balsam Fire Admin BS FD Adm Y N 3 4Bigfork Fire Admin BF FD Adm Y N 4 4Bovey Fire Admin BV FD Adm Y N 3 4
Calumet Fire Admin CA FD Adm Y N 3 4Cohasset Fire Admin CH FD Adm Y N 4 4Coleraine Fire Admin CL FD Adm Y N 3 4Deer River Fire Admin DR FD Adm Y N 4 4Goodland Fire Admin GL FD Adm Y N 3 4
Grand Rapids Fire Admin GR FD Adm Y N 4 4Keewatin Fire Admin KW FD Adm Y N 3 4Marble Fire Admin MB FD Adm Y N 4 4
Nashwauk Fire Admin NW FD Adm Y N 3 4Squaw Lake Fire Admin SQ FD Adm Y N 4 4
Taconite Fire Admin TC FD Adm Y N 3 4WarbaFeelySago Fire Admin WFS FD Adm Y N 4 4
Fire VHF Mu Aid FD Muaid Y Y 3 3Itasca Co EMS 1 IT EMS (AMB) 1 Y Y 5 2Itasca Co EMS 2 IT EMS (AMB) 2 Y Y 6 2
Itasca Co EMS Tac IT EMS (AMB) Tac Y Y 3
FireEMS Scene of Action SOAFIRE2 N N na na
Bigfork Ambulance Admin BF AMB Adm Y N 5Buck Lake 1st Responders BL 1st AdmDeer River Ambulance Admin DR AMB Adm Y N 6
Meds1 Ambulance Admin M1 AMB Adm Y N 5Naswauk Ambulance Admin NW AMB Adm
Squaw Lake 1st Resp Admin SQ 1st Adm Y N 6
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
24
Questionshellipso far
25
Simulcast Transmitting Systems
Simulcast Transmitting is defined as bull A radio system where the same radio
frequencies are Simultaneously Broadcast from all tower sites within the radio system
bull This allows same radio frequencies to be used throughout the entire coverage area
26
Simulcast Transmitting Systems
Simulcast Benefitsbull Seamless communications throughout the radio
systemrsquos coverage areabull Improved radio frequency utilizationbull Improved coverage in areas with difficult
terrainbull Improved in-building coverage (signals in
overlap zones are ldquoadditiverdquo)
27
Simulcast Transmitting Systems
Simulcast ldquoconsrdquo bull Not inexpensive technologybull Tower site spacing is critical (especially when
using NPSPAC frequencies)bull Signal ldquotimingrdquo is critical between all sitesbull Tower site interconnection (microwave T1
etc) is also critical and can be expensive
28
Simulcast Transmitting Systems
Site 1Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
29
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
Kandiyohi Co MN ndash with Simulcast
30
31
ldquoSimulcastrdquo fills in where single site canrsquot
32
Simulcast Issues
bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality
33
Simulcast Issues
bull Slightly out of phase -ldquoGhostingrdquo on a TV set
bull Out-of-phase signals can cause destructive cancellation
bull Fully in-phase signals produce constructive composite signal
34
Discussion and questions regarding Simulcast transmission
techniques and issues
35
Multicast Transmitting Systems
Multicast Transmitting is defined as bull A radio system where different radio
frequencies are used at each tower site within the radio system
Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost
36
Multicast Transmitting Systems
Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its
own set of frequencies)bull No Simulcast coverage benefits (overlap
voting)bull Units ldquoroamrdquo between sites
37
f1 f2 f3 f4 f5
f6 f7 f8 f9 f10
Kandiyohi Co MN ndash with Multicast
38
ARMER System
In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link
Typical ARMER tower site is Multicast Typical Local Ehancement system is
Simulcast
39
Zone Controller
40
Radio System Modulation Technologies
bull Analog vs DigitalMost existing Public Safety radio
systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why
41
Modulation Techniques
Analog transmission
Digital transmission
Information is sent by changing the frequency amplitude or phase of the radio signal
Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)
42
Modulation Techniques
bull Digital Benefits Clearer audio throughout system coverage
area
Improved radio frequency efficiency
Improved system coverage
Imbedded signaling options
Encryption with no range loss
43
Voting Receiver Technology
In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site
In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip
hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip
hellipwhich may be stronger than the original signal
44
Voting Receiver Systems
Site 1
Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5f1 f2 f3 f4 f5
Comparator
Received audio to System
45
Discussionamp
Questions
Slide Number 1
Presentation Agenda
ldquoTrunking 101rdquo
What is ldquoTrunkingrdquo
Conventional vs Trunked
Slide Number 6
Slide Number 7
Your Bank Tellers ndash as ldquoConventionalrdquo
Conventional vs Trunked
Trunked Radio Systems
Conventional vs Trunked
Conventional vs Trunked
Basic Trunking Diagram
Your Bank Tellers ndash as ldquoTrunkedrdquo
Conventional vs Trunked
So How Does It Work
Control Channel continuously transmits system data to all radios
Radio user presses TX button and radio information is sent via control channel to Central Controller
Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
When transmission is completed all units revert back to Control Channel
Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
Fire amp EMS Talk Groups
Questionshellipso far
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Kandiyohi Co MN ndash with Simulcast
Slide Number 31
Simulcast Issues
Simulcast Issues
Discussion and questions regarding Simulcast transmission techniques and issues
Multicast Transmitting Systems
Multicast Transmitting Systems
Kandiyohi Co MN ndash with Multicast
ARMER System
Slide Number 39
Radio System Modulation Technologies
Modulation Techniques
Modulation Techniques
Voting Receiver Technology
Voting Receiver Systems
DiscussionampQuestions
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
24
Questionshellipso far
25
Simulcast Transmitting Systems
Simulcast Transmitting is defined as bull A radio system where the same radio
frequencies are Simultaneously Broadcast from all tower sites within the radio system
bull This allows same radio frequencies to be used throughout the entire coverage area
26
Simulcast Transmitting Systems
Simulcast Benefitsbull Seamless communications throughout the radio
systemrsquos coverage areabull Improved radio frequency utilizationbull Improved coverage in areas with difficult
terrainbull Improved in-building coverage (signals in
overlap zones are ldquoadditiverdquo)
27
Simulcast Transmitting Systems
Simulcast ldquoconsrdquo bull Not inexpensive technologybull Tower site spacing is critical (especially when
using NPSPAC frequencies)bull Signal ldquotimingrdquo is critical between all sitesbull Tower site interconnection (microwave T1
etc) is also critical and can be expensive
28
Simulcast Transmitting Systems
Site 1Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
29
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
Kandiyohi Co MN ndash with Simulcast
30
31
ldquoSimulcastrdquo fills in where single site canrsquot
32
Simulcast Issues
bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality
33
Simulcast Issues
bull Slightly out of phase -ldquoGhostingrdquo on a TV set
bull Out-of-phase signals can cause destructive cancellation
bull Fully in-phase signals produce constructive composite signal
34
Discussion and questions regarding Simulcast transmission
techniques and issues
35
Multicast Transmitting Systems
Multicast Transmitting is defined as bull A radio system where different radio
frequencies are used at each tower site within the radio system
Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost
36
Multicast Transmitting Systems
Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its
own set of frequencies)bull No Simulcast coverage benefits (overlap
voting)bull Units ldquoroamrdquo between sites
37
f1 f2 f3 f4 f5
f6 f7 f8 f9 f10
Kandiyohi Co MN ndash with Multicast
38
ARMER System
In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link
Typical ARMER tower site is Multicast Typical Local Ehancement system is
Simulcast
39
Zone Controller
40
Radio System Modulation Technologies
bull Analog vs DigitalMost existing Public Safety radio
systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why
41
Modulation Techniques
Analog transmission
Digital transmission
Information is sent by changing the frequency amplitude or phase of the radio signal
Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)
42
Modulation Techniques
bull Digital Benefits Clearer audio throughout system coverage
area
Improved radio frequency efficiency
Improved system coverage
Imbedded signaling options
Encryption with no range loss
43
Voting Receiver Technology
In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site
In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip
hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip
hellipwhich may be stronger than the original signal
44
Voting Receiver Systems
Site 1
Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5f1 f2 f3 f4 f5
Comparator
Received audio to System
45
Discussionamp
Questions
Slide Number 1
Presentation Agenda
ldquoTrunking 101rdquo
What is ldquoTrunkingrdquo
Conventional vs Trunked
Slide Number 6
Slide Number 7
Your Bank Tellers ndash as ldquoConventionalrdquo
Conventional vs Trunked
Trunked Radio Systems
Conventional vs Trunked
Conventional vs Trunked
Basic Trunking Diagram
Your Bank Tellers ndash as ldquoTrunkedrdquo
Conventional vs Trunked
So How Does It Work
Control Channel continuously transmits system data to all radios
Radio user presses TX button and radio information is sent via control channel to Central Controller
Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
When transmission is completed all units revert back to Control Channel
Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
Fire amp EMS Talk Groups
Questionshellipso far
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Kandiyohi Co MN ndash with Simulcast
Slide Number 31
Simulcast Issues
Simulcast Issues
Discussion and questions regarding Simulcast transmission techniques and issues
Multicast Transmitting Systems
Multicast Transmitting Systems
Kandiyohi Co MN ndash with Multicast
ARMER System
Slide Number 39
Radio System Modulation Technologies
Modulation Techniques
Modulation Techniques
Voting Receiver Technology
Voting Receiver Systems
DiscussionampQuestions
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
Main Map
ampCampArialBoldamp12Itasca County Fleet Map - Draft
ampLRev 5-7-07
24
Questionshellipso far
25
Simulcast Transmitting Systems
Simulcast Transmitting is defined as bull A radio system where the same radio
frequencies are Simultaneously Broadcast from all tower sites within the radio system
bull This allows same radio frequencies to be used throughout the entire coverage area
26
Simulcast Transmitting Systems
Simulcast Benefitsbull Seamless communications throughout the radio
systemrsquos coverage areabull Improved radio frequency utilizationbull Improved coverage in areas with difficult
terrainbull Improved in-building coverage (signals in
overlap zones are ldquoadditiverdquo)
27
Simulcast Transmitting Systems
Simulcast ldquoconsrdquo bull Not inexpensive technologybull Tower site spacing is critical (especially when
using NPSPAC frequencies)bull Signal ldquotimingrdquo is critical between all sitesbull Tower site interconnection (microwave T1
etc) is also critical and can be expensive
28
Simulcast Transmitting Systems
Site 1Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
29
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
Kandiyohi Co MN ndash with Simulcast
30
31
ldquoSimulcastrdquo fills in where single site canrsquot
32
Simulcast Issues
bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality
33
Simulcast Issues
bull Slightly out of phase -ldquoGhostingrdquo on a TV set
bull Out-of-phase signals can cause destructive cancellation
bull Fully in-phase signals produce constructive composite signal
34
Discussion and questions regarding Simulcast transmission
techniques and issues
35
Multicast Transmitting Systems
Multicast Transmitting is defined as bull A radio system where different radio
frequencies are used at each tower site within the radio system
Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost
36
Multicast Transmitting Systems
Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its
own set of frequencies)bull No Simulcast coverage benefits (overlap
voting)bull Units ldquoroamrdquo between sites
37
f1 f2 f3 f4 f5
f6 f7 f8 f9 f10
Kandiyohi Co MN ndash with Multicast
38
ARMER System
In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link
Typical ARMER tower site is Multicast Typical Local Ehancement system is
Simulcast
39
Zone Controller
40
Radio System Modulation Technologies
bull Analog vs DigitalMost existing Public Safety radio
systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why
41
Modulation Techniques
Analog transmission
Digital transmission
Information is sent by changing the frequency amplitude or phase of the radio signal
Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)
42
Modulation Techniques
bull Digital Benefits Clearer audio throughout system coverage
area
Improved radio frequency efficiency
Improved system coverage
Imbedded signaling options
Encryption with no range loss
43
Voting Receiver Technology
In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site
In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip
hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip
hellipwhich may be stronger than the original signal
44
Voting Receiver Systems
Site 1
Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5f1 f2 f3 f4 f5
Comparator
Received audio to System
45
Discussionamp
Questions
Slide Number 1
Presentation Agenda
ldquoTrunking 101rdquo
What is ldquoTrunkingrdquo
Conventional vs Trunked
Slide Number 6
Slide Number 7
Your Bank Tellers ndash as ldquoConventionalrdquo
Conventional vs Trunked
Trunked Radio Systems
Conventional vs Trunked
Conventional vs Trunked
Basic Trunking Diagram
Your Bank Tellers ndash as ldquoTrunkedrdquo
Conventional vs Trunked
So How Does It Work
Control Channel continuously transmits system data to all radios
Radio user presses TX button and radio information is sent via control channel to Central Controller
Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
When transmission is completed all units revert back to Control Channel
Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
Fire amp EMS Talk Groups
Questionshellipso far
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Kandiyohi Co MN ndash with Simulcast
Slide Number 31
Simulcast Issues
Simulcast Issues
Discussion and questions regarding Simulcast transmission techniques and issues
Multicast Transmitting Systems
Multicast Transmitting Systems
Kandiyohi Co MN ndash with Multicast
ARMER System
Slide Number 39
Radio System Modulation Technologies
Modulation Techniques
Modulation Techniques
Voting Receiver Technology
Voting Receiver Systems
DiscussionampQuestions
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Law
1
Itasca Co Law 1
IT Law 1
Y
Y
1
2
2
Itasca Co Law 2
IT Law 2
Y
Y
2
2
3
Itasca Co Law 3
IT Law 3
Y
Y
1
3
4
Itasca Co Law Tac
IT Law Tac
Y
Y
2
3
5
Itasca Co SO Admin
IT SO Adm
Y
N
1
3
6
Itasca Co Srch amp Res
IT S-R
Y
N
2
3
7
Itasca Co Probation
IT Prob
Y
N
1
3
8
Itasca Co SO Jail
IT SO Jail
N
na
na
New 800 Simplex
9
Grand Rapids PD
GR PD Ops
Y
Y
2
2
10
Drug Task Force
IT DTF
Y
N
11
Emer Response Team
IT ERT
Y
N
12
Law Scene of Action
SOA P1
N
N
na
na
868950 MhzARMER Standard
Law Adm
13
Grand Rapids PD Admin
GR PD Adm
Y
N
1
4
14
Bigfork Police Admin
BF PD Adm
Y
N
2
4
15
Bovey Police Admin
BV PD Adm
Y
N
1
4
16
Coleraine Police Admin
CL PD Adm
Y
N
2
4
17
Deer River Police Admin
DR PD Adm
Y
N
1
4
18
Keewatin Police Admin
KW PD Adm
Y
N
2
4
19
Nashwauk Police Admin
NW PD Adm
Y
N
1
4
Fire
1
Itasca Co Fire 1
IT Fire 1
Y
Y
3
2
2
Itasca Co Fire 2
IT Fire 2
Y
Y
4
2
3
Itasca Co Fire 3
IT Fire 3
Y
Y
3
3
4
Itasca Co Fire Tac
IT Fire Tac
Y
Y
4
4
5
FireEMS Scene of Action
SOAFIRE1
N
N
na
na
868975 MhzARMER Standard
Fire
6
Balsam Fire Admin
BS FD Adm
Y
N
3
4
7
Bigfork Fire Admin
BF FD Adm
Y
N
4
4
8
Bovey Fire Admin
BV FD Adm
Y
N
3
4
9
Calumet Fire Admin
CA FD Adm
Y
N
3
4
10
Cohasset Fire Admin
CH FD Adm
Y
N
4
4
11
Coleraine Fire Admin
CL FD Adm
Y
N
3
4
12
Deer River Fire Admin
DR FD Adm
Y
N
4
4
13
Goodland Fire Admin
GL FD Adm
Y
N
3
4
14
Grand Rapids Fire Admin
GR FD Adm
Y
N
4
4
15
Keewatin Fire Admin
KW FD Adm
Y
N
3
4
16
Marble Fire Admin
MB FD Adm
Y
N
4
4
17
Nashwauk Fire Admin
NW FD Adm
Y
N
3
4
18
Squaw Lake Fire Admin
SQ FD Adm
Y
N
4
4
19
Taconite Fire Admin
TC FD Adm
Y
N
3
4
20
WarbaFeelySago Fire Admin
WFS FD Adm
Y
N
4
4
21
Fire VHF Mu Aid
FD Muaid
Y
Y
3
3
TBD
EMS
1
Itasca Co EMS 1
IT EMS (AMB) 1
Y
Y
5
2
2
Itasca Co EMS 2
IT EMS (AMB) 2
Y
Y
6
2
3
Itasca Co EMS Tac
IT EMS (AMB) Tac
Y
Y
3
4
FireEMS Scene of Action
SOAFIRE2
N
N
na
na
8689875 MhzARMER Standard
EMS
5
Bigfork Ambulance Admin
BF AMB Adm
Y
N
5
6
Buck Lake 1st Responders
BL 1st Adm
7
Deer River Ambulance Admin
DR AMB Adm
Y
N
6
8
Meds1 Ambulance Admin
M1 AMB Adm
Y
N
5
9
Naswauk Ambulance Admin
NW AMB Adm
10
Squaw Lake 1st Resp Admin
SQ 1st Adm
Y
N
6
Talkgroup ID (HEX)
Talkgroup ID (DEC)
Announcement group Name
Talkgroup Name
Talkgroup Alias (ABBR)
Trunked
Dispatch
Failsoft Channel Number
Talkgroup Priority
Comments
Interop
1
Itasca Co VHF Interop 1
IT VHF 1
Y
Y
Old VHF Repeater Channel
2
Itasca Co VHF Interop 2
IT VHF 2
Y
Y
Old VHF Repeater Channel
3
MINSEF VHF Interop
MINSEF
Y
Y
155475 Mhz
4
State Fire VHF Interop
Fire VHF
Y
Y
154295 Mhz
5
State Ambulance VHF Interop
EMS VHF
Y
Y
155340 Mhz
6
Itasca Co Event 1
IT Event 1
Y
Y
7
Itasca Co Event 2
IT Event 2
Y
Y
8
Future Regional Interop 1
A-TAC1 Z5
Y
All System Users
9
Future Regional Interop 2
A-TAC2 Z5
Y
All System Users
10
Future Regional Interop 3
A-TAC3 Z5
Y
All System Users
11
Future Regional Interop 4
A-TAC4 Z5
Y
All System Users
12
Future Regional Interop 1
P-TAC1 Z5
Y
Public Safety Users Only
13
Future Regional Interop 2
P-TAC2 Z5
Y
Public Safety Users Only
14
Future Regional Interop 3
P-TAC3 Z5
Y
Public Safety Users Only
15
Future Regional Interop 4
P-TAC4 Z5
Y
Public Safety Users Only
16
Aitkin Co VHF Interop
Aitk VHF
Y
Y
VHF RF Control Station
17
Beltrami Co VHF Interop
Belt VHF
Y
Y
VHF RF Control Station
18
Cass Co VHF Interop
Cass VHF
Y
Y
VHF RF Control Station
19
Hibbing PD VHF Interop
Hib VHF
Y
VHF RF Control Station
20
Koochiching Co VHF Interop
KoochVHF
Y
Y
VHF RF Control Station
21
St Louis Co VHF Interop
SLCo VHF
Y
Y
VHF RF Control Station
22
NPSPAC Hailing Mutual Aid
ICALL-MA
N
Y
Conventional 800 Mhz
23
NPSPAC TAC 1 Mutual Aid
ITAC1-MA
N
Y
Conventional 800 Mhz
24
NPSPAC TAC 2 Mutual Aid
NA
NA
NA
Not in System
25
NPSPAC TAC 3 Mutual Aid
NA
NA
NA
Not in System
26
NPSPAC TAC 4 Mutual Aid
NA
NA
NA
Not in System
27
Regroup
Dyn Rgrp
Y
Y
Co Ops
1
Itasca Co Highway Ops
IT Hwy 1
Y
Y
4
2
Itasca Co Highway Tac
IT Hwy 2
Y
N
4
3
Itasca Co Land Dept
IT Land
Y
N
4
4
Itasca Co Assessor
IT Assr
Y
N
4
City Ops
1
Cohasset Public Works
CH PW
Y
N
4
2
Deer River Public Works
DR PW
Y
N
4
3
Grand Rapids Public Works
GR PW
Y
N
4
Future Expansion
Future 1
Y
TBDFuture
Future Expansion
Future 2
Y
TBDFuture
Future Expansion
Future 3
Y
TBDFuture
Future Expansion
Future 4
Y
TBDFuture
24
Questionshellipso far
25
Simulcast Transmitting Systems
Simulcast Transmitting is defined as bull A radio system where the same radio
frequencies are Simultaneously Broadcast from all tower sites within the radio system
bull This allows same radio frequencies to be used throughout the entire coverage area
26
Simulcast Transmitting Systems
Simulcast Benefitsbull Seamless communications throughout the radio
systemrsquos coverage areabull Improved radio frequency utilizationbull Improved coverage in areas with difficult
terrainbull Improved in-building coverage (signals in
overlap zones are ldquoadditiverdquo)
27
Simulcast Transmitting Systems
Simulcast ldquoconsrdquo bull Not inexpensive technologybull Tower site spacing is critical (especially when
using NPSPAC frequencies)bull Signal ldquotimingrdquo is critical between all sitesbull Tower site interconnection (microwave T1
etc) is also critical and can be expensive
28
Simulcast Transmitting Systems
Site 1Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
29
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
Kandiyohi Co MN ndash with Simulcast
30
31
ldquoSimulcastrdquo fills in where single site canrsquot
32
Simulcast Issues
bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality
33
Simulcast Issues
bull Slightly out of phase -ldquoGhostingrdquo on a TV set
bull Out-of-phase signals can cause destructive cancellation
bull Fully in-phase signals produce constructive composite signal
34
Discussion and questions regarding Simulcast transmission
techniques and issues
35
Multicast Transmitting Systems
Multicast Transmitting is defined as bull A radio system where different radio
frequencies are used at each tower site within the radio system
Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost
36
Multicast Transmitting Systems
Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its
own set of frequencies)bull No Simulcast coverage benefits (overlap
voting)bull Units ldquoroamrdquo between sites
37
f1 f2 f3 f4 f5
f6 f7 f8 f9 f10
Kandiyohi Co MN ndash with Multicast
38
ARMER System
In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link
Typical ARMER tower site is Multicast Typical Local Ehancement system is
Simulcast
39
Zone Controller
40
Radio System Modulation Technologies
bull Analog vs DigitalMost existing Public Safety radio
systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why
41
Modulation Techniques
Analog transmission
Digital transmission
Information is sent by changing the frequency amplitude or phase of the radio signal
Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)
42
Modulation Techniques
bull Digital Benefits Clearer audio throughout system coverage
area
Improved radio frequency efficiency
Improved system coverage
Imbedded signaling options
Encryption with no range loss
43
Voting Receiver Technology
In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site
In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip
hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip
hellipwhich may be stronger than the original signal
44
Voting Receiver Systems
Site 1
Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5f1 f2 f3 f4 f5
Comparator
Received audio to System
45
Discussionamp
Questions
Slide Number 1
Presentation Agenda
ldquoTrunking 101rdquo
What is ldquoTrunkingrdquo
Conventional vs Trunked
Slide Number 6
Slide Number 7
Your Bank Tellers ndash as ldquoConventionalrdquo
Conventional vs Trunked
Trunked Radio Systems
Conventional vs Trunked
Conventional vs Trunked
Basic Trunking Diagram
Your Bank Tellers ndash as ldquoTrunkedrdquo
Conventional vs Trunked
So How Does It Work
Control Channel continuously transmits system data to all radios
Radio user presses TX button and radio information is sent via control channel to Central Controller
Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
When transmission is completed all units revert back to Control Channel
Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
Fire amp EMS Talk Groups
Questionshellipso far
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Kandiyohi Co MN ndash with Simulcast
Slide Number 31
Simulcast Issues
Simulcast Issues
Discussion and questions regarding Simulcast transmission techniques and issues
Multicast Transmitting Systems
Multicast Transmitting Systems
Kandiyohi Co MN ndash with Multicast
ARMER System
Slide Number 39
Radio System Modulation Technologies
Modulation Techniques
Modulation Techniques
Voting Receiver Technology
Voting Receiver Systems
DiscussionampQuestions
25
Simulcast Transmitting Systems
Simulcast Transmitting is defined as bull A radio system where the same radio
frequencies are Simultaneously Broadcast from all tower sites within the radio system
bull This allows same radio frequencies to be used throughout the entire coverage area
26
Simulcast Transmitting Systems
Simulcast Benefitsbull Seamless communications throughout the radio
systemrsquos coverage areabull Improved radio frequency utilizationbull Improved coverage in areas with difficult
terrainbull Improved in-building coverage (signals in
overlap zones are ldquoadditiverdquo)
27
Simulcast Transmitting Systems
Simulcast ldquoconsrdquo bull Not inexpensive technologybull Tower site spacing is critical (especially when
using NPSPAC frequencies)bull Signal ldquotimingrdquo is critical between all sitesbull Tower site interconnection (microwave T1
etc) is also critical and can be expensive
28
Simulcast Transmitting Systems
Site 1Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
29
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
Kandiyohi Co MN ndash with Simulcast
30
31
ldquoSimulcastrdquo fills in where single site canrsquot
32
Simulcast Issues
bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality
33
Simulcast Issues
bull Slightly out of phase -ldquoGhostingrdquo on a TV set
bull Out-of-phase signals can cause destructive cancellation
bull Fully in-phase signals produce constructive composite signal
34
Discussion and questions regarding Simulcast transmission
techniques and issues
35
Multicast Transmitting Systems
Multicast Transmitting is defined as bull A radio system where different radio
frequencies are used at each tower site within the radio system
Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost
36
Multicast Transmitting Systems
Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its
own set of frequencies)bull No Simulcast coverage benefits (overlap
voting)bull Units ldquoroamrdquo between sites
37
f1 f2 f3 f4 f5
f6 f7 f8 f9 f10
Kandiyohi Co MN ndash with Multicast
38
ARMER System
In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link
Typical ARMER tower site is Multicast Typical Local Ehancement system is
Simulcast
39
Zone Controller
40
Radio System Modulation Technologies
bull Analog vs DigitalMost existing Public Safety radio
systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why
41
Modulation Techniques
Analog transmission
Digital transmission
Information is sent by changing the frequency amplitude or phase of the radio signal
Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)
42
Modulation Techniques
bull Digital Benefits Clearer audio throughout system coverage
area
Improved radio frequency efficiency
Improved system coverage
Imbedded signaling options
Encryption with no range loss
43
Voting Receiver Technology
In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site
In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip
hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip
hellipwhich may be stronger than the original signal
44
Voting Receiver Systems
Site 1
Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5f1 f2 f3 f4 f5
Comparator
Received audio to System
45
Discussionamp
Questions
Slide Number 1
Presentation Agenda
ldquoTrunking 101rdquo
What is ldquoTrunkingrdquo
Conventional vs Trunked
Slide Number 6
Slide Number 7
Your Bank Tellers ndash as ldquoConventionalrdquo
Conventional vs Trunked
Trunked Radio Systems
Conventional vs Trunked
Conventional vs Trunked
Basic Trunking Diagram
Your Bank Tellers ndash as ldquoTrunkedrdquo
Conventional vs Trunked
So How Does It Work
Control Channel continuously transmits system data to all radios
Radio user presses TX button and radio information is sent via control channel to Central Controller
Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
When transmission is completed all units revert back to Control Channel
Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
Fire amp EMS Talk Groups
Questionshellipso far
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Kandiyohi Co MN ndash with Simulcast
Slide Number 31
Simulcast Issues
Simulcast Issues
Discussion and questions regarding Simulcast transmission techniques and issues
Multicast Transmitting Systems
Multicast Transmitting Systems
Kandiyohi Co MN ndash with Multicast
ARMER System
Slide Number 39
Radio System Modulation Technologies
Modulation Techniques
Modulation Techniques
Voting Receiver Technology
Voting Receiver Systems
DiscussionampQuestions
26
Simulcast Transmitting Systems
Simulcast Benefitsbull Seamless communications throughout the radio
systemrsquos coverage areabull Improved radio frequency utilizationbull Improved coverage in areas with difficult
terrainbull Improved in-building coverage (signals in
overlap zones are ldquoadditiverdquo)
27
Simulcast Transmitting Systems
Simulcast ldquoconsrdquo bull Not inexpensive technologybull Tower site spacing is critical (especially when
using NPSPAC frequencies)bull Signal ldquotimingrdquo is critical between all sitesbull Tower site interconnection (microwave T1
etc) is also critical and can be expensive
28
Simulcast Transmitting Systems
Site 1Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
29
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
Kandiyohi Co MN ndash with Simulcast
30
31
ldquoSimulcastrdquo fills in where single site canrsquot
32
Simulcast Issues
bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality
33
Simulcast Issues
bull Slightly out of phase -ldquoGhostingrdquo on a TV set
bull Out-of-phase signals can cause destructive cancellation
bull Fully in-phase signals produce constructive composite signal
34
Discussion and questions regarding Simulcast transmission
techniques and issues
35
Multicast Transmitting Systems
Multicast Transmitting is defined as bull A radio system where different radio
frequencies are used at each tower site within the radio system
Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost
36
Multicast Transmitting Systems
Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its
own set of frequencies)bull No Simulcast coverage benefits (overlap
voting)bull Units ldquoroamrdquo between sites
37
f1 f2 f3 f4 f5
f6 f7 f8 f9 f10
Kandiyohi Co MN ndash with Multicast
38
ARMER System
In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link
Typical ARMER tower site is Multicast Typical Local Ehancement system is
Simulcast
39
Zone Controller
40
Radio System Modulation Technologies
bull Analog vs DigitalMost existing Public Safety radio
systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why
41
Modulation Techniques
Analog transmission
Digital transmission
Information is sent by changing the frequency amplitude or phase of the radio signal
Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)
42
Modulation Techniques
bull Digital Benefits Clearer audio throughout system coverage
area
Improved radio frequency efficiency
Improved system coverage
Imbedded signaling options
Encryption with no range loss
43
Voting Receiver Technology
In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site
In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip
hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip
hellipwhich may be stronger than the original signal
44
Voting Receiver Systems
Site 1
Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5f1 f2 f3 f4 f5
Comparator
Received audio to System
45
Discussionamp
Questions
Slide Number 1
Presentation Agenda
ldquoTrunking 101rdquo
What is ldquoTrunkingrdquo
Conventional vs Trunked
Slide Number 6
Slide Number 7
Your Bank Tellers ndash as ldquoConventionalrdquo
Conventional vs Trunked
Trunked Radio Systems
Conventional vs Trunked
Conventional vs Trunked
Basic Trunking Diagram
Your Bank Tellers ndash as ldquoTrunkedrdquo
Conventional vs Trunked
So How Does It Work
Control Channel continuously transmits system data to all radios
Radio user presses TX button and radio information is sent via control channel to Central Controller
Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
When transmission is completed all units revert back to Control Channel
Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
Fire amp EMS Talk Groups
Questionshellipso far
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Kandiyohi Co MN ndash with Simulcast
Slide Number 31
Simulcast Issues
Simulcast Issues
Discussion and questions regarding Simulcast transmission techniques and issues
Multicast Transmitting Systems
Multicast Transmitting Systems
Kandiyohi Co MN ndash with Multicast
ARMER System
Slide Number 39
Radio System Modulation Technologies
Modulation Techniques
Modulation Techniques
Voting Receiver Technology
Voting Receiver Systems
DiscussionampQuestions
27
Simulcast Transmitting Systems
Simulcast ldquoconsrdquo bull Not inexpensive technologybull Tower site spacing is critical (especially when
using NPSPAC frequencies)bull Signal ldquotimingrdquo is critical between all sitesbull Tower site interconnection (microwave T1
etc) is also critical and can be expensive
28
Simulcast Transmitting Systems
Site 1Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
29
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
Kandiyohi Co MN ndash with Simulcast
30
31
ldquoSimulcastrdquo fills in where single site canrsquot
32
Simulcast Issues
bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality
33
Simulcast Issues
bull Slightly out of phase -ldquoGhostingrdquo on a TV set
bull Out-of-phase signals can cause destructive cancellation
bull Fully in-phase signals produce constructive composite signal
34
Discussion and questions regarding Simulcast transmission
techniques and issues
35
Multicast Transmitting Systems
Multicast Transmitting is defined as bull A radio system where different radio
frequencies are used at each tower site within the radio system
Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost
36
Multicast Transmitting Systems
Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its
own set of frequencies)bull No Simulcast coverage benefits (overlap
voting)bull Units ldquoroamrdquo between sites
37
f1 f2 f3 f4 f5
f6 f7 f8 f9 f10
Kandiyohi Co MN ndash with Multicast
38
ARMER System
In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link
Typical ARMER tower site is Multicast Typical Local Ehancement system is
Simulcast
39
Zone Controller
40
Radio System Modulation Technologies
bull Analog vs DigitalMost existing Public Safety radio
systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why
41
Modulation Techniques
Analog transmission
Digital transmission
Information is sent by changing the frequency amplitude or phase of the radio signal
Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)
42
Modulation Techniques
bull Digital Benefits Clearer audio throughout system coverage
area
Improved radio frequency efficiency
Improved system coverage
Imbedded signaling options
Encryption with no range loss
43
Voting Receiver Technology
In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site
In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip
hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip
hellipwhich may be stronger than the original signal
44
Voting Receiver Systems
Site 1
Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5f1 f2 f3 f4 f5
Comparator
Received audio to System
45
Discussionamp
Questions
Slide Number 1
Presentation Agenda
ldquoTrunking 101rdquo
What is ldquoTrunkingrdquo
Conventional vs Trunked
Slide Number 6
Slide Number 7
Your Bank Tellers ndash as ldquoConventionalrdquo
Conventional vs Trunked
Trunked Radio Systems
Conventional vs Trunked
Conventional vs Trunked
Basic Trunking Diagram
Your Bank Tellers ndash as ldquoTrunkedrdquo
Conventional vs Trunked
So How Does It Work
Control Channel continuously transmits system data to all radios
Radio user presses TX button and radio information is sent via control channel to Central Controller
Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
When transmission is completed all units revert back to Control Channel
Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
Fire amp EMS Talk Groups
Questionshellipso far
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Kandiyohi Co MN ndash with Simulcast
Slide Number 31
Simulcast Issues
Simulcast Issues
Discussion and questions regarding Simulcast transmission techniques and issues
Multicast Transmitting Systems
Multicast Transmitting Systems
Kandiyohi Co MN ndash with Multicast
ARMER System
Slide Number 39
Radio System Modulation Technologies
Modulation Techniques
Modulation Techniques
Voting Receiver Technology
Voting Receiver Systems
DiscussionampQuestions
28
Simulcast Transmitting Systems
Site 1Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
29
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
Kandiyohi Co MN ndash with Simulcast
30
31
ldquoSimulcastrdquo fills in where single site canrsquot
32
Simulcast Issues
bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality
33
Simulcast Issues
bull Slightly out of phase -ldquoGhostingrdquo on a TV set
bull Out-of-phase signals can cause destructive cancellation
bull Fully in-phase signals produce constructive composite signal
34
Discussion and questions regarding Simulcast transmission
techniques and issues
35
Multicast Transmitting Systems
Multicast Transmitting is defined as bull A radio system where different radio
frequencies are used at each tower site within the radio system
Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost
36
Multicast Transmitting Systems
Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its
own set of frequencies)bull No Simulcast coverage benefits (overlap
voting)bull Units ldquoroamrdquo between sites
37
f1 f2 f3 f4 f5
f6 f7 f8 f9 f10
Kandiyohi Co MN ndash with Multicast
38
ARMER System
In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link
Typical ARMER tower site is Multicast Typical Local Ehancement system is
Simulcast
39
Zone Controller
40
Radio System Modulation Technologies
bull Analog vs DigitalMost existing Public Safety radio
systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why
41
Modulation Techniques
Analog transmission
Digital transmission
Information is sent by changing the frequency amplitude or phase of the radio signal
Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)
42
Modulation Techniques
bull Digital Benefits Clearer audio throughout system coverage
area
Improved radio frequency efficiency
Improved system coverage
Imbedded signaling options
Encryption with no range loss
43
Voting Receiver Technology
In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site
In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip
hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip
hellipwhich may be stronger than the original signal
44
Voting Receiver Systems
Site 1
Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5f1 f2 f3 f4 f5
Comparator
Received audio to System
45
Discussionamp
Questions
Slide Number 1
Presentation Agenda
ldquoTrunking 101rdquo
What is ldquoTrunkingrdquo
Conventional vs Trunked
Slide Number 6
Slide Number 7
Your Bank Tellers ndash as ldquoConventionalrdquo
Conventional vs Trunked
Trunked Radio Systems
Conventional vs Trunked
Conventional vs Trunked
Basic Trunking Diagram
Your Bank Tellers ndash as ldquoTrunkedrdquo
Conventional vs Trunked
So How Does It Work
Control Channel continuously transmits system data to all radios
Radio user presses TX button and radio information is sent via control channel to Central Controller
Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
When transmission is completed all units revert back to Control Channel
Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
Fire amp EMS Talk Groups
Questionshellipso far
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Kandiyohi Co MN ndash with Simulcast
Slide Number 31
Simulcast Issues
Simulcast Issues
Discussion and questions regarding Simulcast transmission techniques and issues
Multicast Transmitting Systems
Multicast Transmitting Systems
Kandiyohi Co MN ndash with Multicast
ARMER System
Slide Number 39
Radio System Modulation Technologies
Modulation Techniques
Modulation Techniques
Voting Receiver Technology
Voting Receiver Systems
DiscussionampQuestions
29
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5
Kandiyohi Co MN ndash with Simulcast
30
31
ldquoSimulcastrdquo fills in where single site canrsquot
32
Simulcast Issues
bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality
33
Simulcast Issues
bull Slightly out of phase -ldquoGhostingrdquo on a TV set
bull Out-of-phase signals can cause destructive cancellation
bull Fully in-phase signals produce constructive composite signal
34
Discussion and questions regarding Simulcast transmission
techniques and issues
35
Multicast Transmitting Systems
Multicast Transmitting is defined as bull A radio system where different radio
frequencies are used at each tower site within the radio system
Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost
36
Multicast Transmitting Systems
Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its
own set of frequencies)bull No Simulcast coverage benefits (overlap
voting)bull Units ldquoroamrdquo between sites
37
f1 f2 f3 f4 f5
f6 f7 f8 f9 f10
Kandiyohi Co MN ndash with Multicast
38
ARMER System
In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link
Typical ARMER tower site is Multicast Typical Local Ehancement system is
Simulcast
39
Zone Controller
40
Radio System Modulation Technologies
bull Analog vs DigitalMost existing Public Safety radio
systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why
41
Modulation Techniques
Analog transmission
Digital transmission
Information is sent by changing the frequency amplitude or phase of the radio signal
Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)
42
Modulation Techniques
bull Digital Benefits Clearer audio throughout system coverage
area
Improved radio frequency efficiency
Improved system coverage
Imbedded signaling options
Encryption with no range loss
43
Voting Receiver Technology
In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site
In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip
hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip
hellipwhich may be stronger than the original signal
44
Voting Receiver Systems
Site 1
Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5f1 f2 f3 f4 f5
Comparator
Received audio to System
45
Discussionamp
Questions
Slide Number 1
Presentation Agenda
ldquoTrunking 101rdquo
What is ldquoTrunkingrdquo
Conventional vs Trunked
Slide Number 6
Slide Number 7
Your Bank Tellers ndash as ldquoConventionalrdquo
Conventional vs Trunked
Trunked Radio Systems
Conventional vs Trunked
Conventional vs Trunked
Basic Trunking Diagram
Your Bank Tellers ndash as ldquoTrunkedrdquo
Conventional vs Trunked
So How Does It Work
Control Channel continuously transmits system data to all radios
Radio user presses TX button and radio information is sent via control channel to Central Controller
Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
When transmission is completed all units revert back to Control Channel
Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
Fire amp EMS Talk Groups
Questionshellipso far
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Kandiyohi Co MN ndash with Simulcast
Slide Number 31
Simulcast Issues
Simulcast Issues
Discussion and questions regarding Simulcast transmission techniques and issues
Multicast Transmitting Systems
Multicast Transmitting Systems
Kandiyohi Co MN ndash with Multicast
ARMER System
Slide Number 39
Radio System Modulation Technologies
Modulation Techniques
Modulation Techniques
Voting Receiver Technology
Voting Receiver Systems
DiscussionampQuestions
30
31
ldquoSimulcastrdquo fills in where single site canrsquot
32
Simulcast Issues
bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality
33
Simulcast Issues
bull Slightly out of phase -ldquoGhostingrdquo on a TV set
bull Out-of-phase signals can cause destructive cancellation
bull Fully in-phase signals produce constructive composite signal
34
Discussion and questions regarding Simulcast transmission
techniques and issues
35
Multicast Transmitting Systems
Multicast Transmitting is defined as bull A radio system where different radio
frequencies are used at each tower site within the radio system
Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost
36
Multicast Transmitting Systems
Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its
own set of frequencies)bull No Simulcast coverage benefits (overlap
voting)bull Units ldquoroamrdquo between sites
37
f1 f2 f3 f4 f5
f6 f7 f8 f9 f10
Kandiyohi Co MN ndash with Multicast
38
ARMER System
In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link
Typical ARMER tower site is Multicast Typical Local Ehancement system is
Simulcast
39
Zone Controller
40
Radio System Modulation Technologies
bull Analog vs DigitalMost existing Public Safety radio
systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why
41
Modulation Techniques
Analog transmission
Digital transmission
Information is sent by changing the frequency amplitude or phase of the radio signal
Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)
42
Modulation Techniques
bull Digital Benefits Clearer audio throughout system coverage
area
Improved radio frequency efficiency
Improved system coverage
Imbedded signaling options
Encryption with no range loss
43
Voting Receiver Technology
In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site
In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip
hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip
hellipwhich may be stronger than the original signal
44
Voting Receiver Systems
Site 1
Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5f1 f2 f3 f4 f5
Comparator
Received audio to System
45
Discussionamp
Questions
Slide Number 1
Presentation Agenda
ldquoTrunking 101rdquo
What is ldquoTrunkingrdquo
Conventional vs Trunked
Slide Number 6
Slide Number 7
Your Bank Tellers ndash as ldquoConventionalrdquo
Conventional vs Trunked
Trunked Radio Systems
Conventional vs Trunked
Conventional vs Trunked
Basic Trunking Diagram
Your Bank Tellers ndash as ldquoTrunkedrdquo
Conventional vs Trunked
So How Does It Work
Control Channel continuously transmits system data to all radios
Radio user presses TX button and radio information is sent via control channel to Central Controller
Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
When transmission is completed all units revert back to Control Channel
Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
Fire amp EMS Talk Groups
Questionshellipso far
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Kandiyohi Co MN ndash with Simulcast
Slide Number 31
Simulcast Issues
Simulcast Issues
Discussion and questions regarding Simulcast transmission techniques and issues
Multicast Transmitting Systems
Multicast Transmitting Systems
Kandiyohi Co MN ndash with Multicast
ARMER System
Slide Number 39
Radio System Modulation Technologies
Modulation Techniques
Modulation Techniques
Voting Receiver Technology
Voting Receiver Systems
DiscussionampQuestions
31
ldquoSimulcastrdquo fills in where single site canrsquot
32
Simulcast Issues
bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality
33
Simulcast Issues
bull Slightly out of phase -ldquoGhostingrdquo on a TV set
bull Out-of-phase signals can cause destructive cancellation
bull Fully in-phase signals produce constructive composite signal
34
Discussion and questions regarding Simulcast transmission
techniques and issues
35
Multicast Transmitting Systems
Multicast Transmitting is defined as bull A radio system where different radio
frequencies are used at each tower site within the radio system
Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost
36
Multicast Transmitting Systems
Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its
own set of frequencies)bull No Simulcast coverage benefits (overlap
voting)bull Units ldquoroamrdquo between sites
37
f1 f2 f3 f4 f5
f6 f7 f8 f9 f10
Kandiyohi Co MN ndash with Multicast
38
ARMER System
In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link
Typical ARMER tower site is Multicast Typical Local Ehancement system is
Simulcast
39
Zone Controller
40
Radio System Modulation Technologies
bull Analog vs DigitalMost existing Public Safety radio
systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why
41
Modulation Techniques
Analog transmission
Digital transmission
Information is sent by changing the frequency amplitude or phase of the radio signal
Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)
42
Modulation Techniques
bull Digital Benefits Clearer audio throughout system coverage
area
Improved radio frequency efficiency
Improved system coverage
Imbedded signaling options
Encryption with no range loss
43
Voting Receiver Technology
In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site
In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip
hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip
hellipwhich may be stronger than the original signal
44
Voting Receiver Systems
Site 1
Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5f1 f2 f3 f4 f5
Comparator
Received audio to System
45
Discussionamp
Questions
Slide Number 1
Presentation Agenda
ldquoTrunking 101rdquo
What is ldquoTrunkingrdquo
Conventional vs Trunked
Slide Number 6
Slide Number 7
Your Bank Tellers ndash as ldquoConventionalrdquo
Conventional vs Trunked
Trunked Radio Systems
Conventional vs Trunked
Conventional vs Trunked
Basic Trunking Diagram
Your Bank Tellers ndash as ldquoTrunkedrdquo
Conventional vs Trunked
So How Does It Work
Control Channel continuously transmits system data to all radios
Radio user presses TX button and radio information is sent via control channel to Central Controller
Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
When transmission is completed all units revert back to Control Channel
Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
Fire amp EMS Talk Groups
Questionshellipso far
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Kandiyohi Co MN ndash with Simulcast
Slide Number 31
Simulcast Issues
Simulcast Issues
Discussion and questions regarding Simulcast transmission techniques and issues
Multicast Transmitting Systems
Multicast Transmitting Systems
Kandiyohi Co MN ndash with Multicast
ARMER System
Slide Number 39
Radio System Modulation Technologies
Modulation Techniques
Modulation Techniques
Voting Receiver Technology
Voting Receiver Systems
DiscussionampQuestions
32
Simulcast Issues
bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality
33
Simulcast Issues
bull Slightly out of phase -ldquoGhostingrdquo on a TV set
bull Out-of-phase signals can cause destructive cancellation
bull Fully in-phase signals produce constructive composite signal
34
Discussion and questions regarding Simulcast transmission
techniques and issues
35
Multicast Transmitting Systems
Multicast Transmitting is defined as bull A radio system where different radio
frequencies are used at each tower site within the radio system
Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost
36
Multicast Transmitting Systems
Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its
own set of frequencies)bull No Simulcast coverage benefits (overlap
voting)bull Units ldquoroamrdquo between sites
37
f1 f2 f3 f4 f5
f6 f7 f8 f9 f10
Kandiyohi Co MN ndash with Multicast
38
ARMER System
In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link
Typical ARMER tower site is Multicast Typical Local Ehancement system is
Simulcast
39
Zone Controller
40
Radio System Modulation Technologies
bull Analog vs DigitalMost existing Public Safety radio
systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why
41
Modulation Techniques
Analog transmission
Digital transmission
Information is sent by changing the frequency amplitude or phase of the radio signal
Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)
42
Modulation Techniques
bull Digital Benefits Clearer audio throughout system coverage
area
Improved radio frequency efficiency
Improved system coverage
Imbedded signaling options
Encryption with no range loss
43
Voting Receiver Technology
In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site
In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip
hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip
hellipwhich may be stronger than the original signal
44
Voting Receiver Systems
Site 1
Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5f1 f2 f3 f4 f5
Comparator
Received audio to System
45
Discussionamp
Questions
Slide Number 1
Presentation Agenda
ldquoTrunking 101rdquo
What is ldquoTrunkingrdquo
Conventional vs Trunked
Slide Number 6
Slide Number 7
Your Bank Tellers ndash as ldquoConventionalrdquo
Conventional vs Trunked
Trunked Radio Systems
Conventional vs Trunked
Conventional vs Trunked
Basic Trunking Diagram
Your Bank Tellers ndash as ldquoTrunkedrdquo
Conventional vs Trunked
So How Does It Work
Control Channel continuously transmits system data to all radios
Radio user presses TX button and radio information is sent via control channel to Central Controller
Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
When transmission is completed all units revert back to Control Channel
Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
Fire amp EMS Talk Groups
Questionshellipso far
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Kandiyohi Co MN ndash with Simulcast
Slide Number 31
Simulcast Issues
Simulcast Issues
Discussion and questions regarding Simulcast transmission techniques and issues
Multicast Transmitting Systems
Multicast Transmitting Systems
Kandiyohi Co MN ndash with Multicast
ARMER System
Slide Number 39
Radio System Modulation Technologies
Modulation Techniques
Modulation Techniques
Voting Receiver Technology
Voting Receiver Systems
DiscussionampQuestions
33
Simulcast Issues
bull Slightly out of phase -ldquoGhostingrdquo on a TV set
bull Out-of-phase signals can cause destructive cancellation
bull Fully in-phase signals produce constructive composite signal
34
Discussion and questions regarding Simulcast transmission
techniques and issues
35
Multicast Transmitting Systems
Multicast Transmitting is defined as bull A radio system where different radio
frequencies are used at each tower site within the radio system
Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost
36
Multicast Transmitting Systems
Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its
own set of frequencies)bull No Simulcast coverage benefits (overlap
voting)bull Units ldquoroamrdquo between sites
37
f1 f2 f3 f4 f5
f6 f7 f8 f9 f10
Kandiyohi Co MN ndash with Multicast
38
ARMER System
In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link
Typical ARMER tower site is Multicast Typical Local Ehancement system is
Simulcast
39
Zone Controller
40
Radio System Modulation Technologies
bull Analog vs DigitalMost existing Public Safety radio
systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why
41
Modulation Techniques
Analog transmission
Digital transmission
Information is sent by changing the frequency amplitude or phase of the radio signal
Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)
42
Modulation Techniques
bull Digital Benefits Clearer audio throughout system coverage
area
Improved radio frequency efficiency
Improved system coverage
Imbedded signaling options
Encryption with no range loss
43
Voting Receiver Technology
In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site
In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip
hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip
hellipwhich may be stronger than the original signal
44
Voting Receiver Systems
Site 1
Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5f1 f2 f3 f4 f5
Comparator
Received audio to System
45
Discussionamp
Questions
Slide Number 1
Presentation Agenda
ldquoTrunking 101rdquo
What is ldquoTrunkingrdquo
Conventional vs Trunked
Slide Number 6
Slide Number 7
Your Bank Tellers ndash as ldquoConventionalrdquo
Conventional vs Trunked
Trunked Radio Systems
Conventional vs Trunked
Conventional vs Trunked
Basic Trunking Diagram
Your Bank Tellers ndash as ldquoTrunkedrdquo
Conventional vs Trunked
So How Does It Work
Control Channel continuously transmits system data to all radios
Radio user presses TX button and radio information is sent via control channel to Central Controller
Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
When transmission is completed all units revert back to Control Channel
Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
Fire amp EMS Talk Groups
Questionshellipso far
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Kandiyohi Co MN ndash with Simulcast
Slide Number 31
Simulcast Issues
Simulcast Issues
Discussion and questions regarding Simulcast transmission techniques and issues
Multicast Transmitting Systems
Multicast Transmitting Systems
Kandiyohi Co MN ndash with Multicast
ARMER System
Slide Number 39
Radio System Modulation Technologies
Modulation Techniques
Modulation Techniques
Voting Receiver Technology
Voting Receiver Systems
DiscussionampQuestions
34
Discussion and questions regarding Simulcast transmission
techniques and issues
35
Multicast Transmitting Systems
Multicast Transmitting is defined as bull A radio system where different radio
frequencies are used at each tower site within the radio system
Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost
36
Multicast Transmitting Systems
Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its
own set of frequencies)bull No Simulcast coverage benefits (overlap
voting)bull Units ldquoroamrdquo between sites
37
f1 f2 f3 f4 f5
f6 f7 f8 f9 f10
Kandiyohi Co MN ndash with Multicast
38
ARMER System
In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link
Typical ARMER tower site is Multicast Typical Local Ehancement system is
Simulcast
39
Zone Controller
40
Radio System Modulation Technologies
bull Analog vs DigitalMost existing Public Safety radio
systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why
41
Modulation Techniques
Analog transmission
Digital transmission
Information is sent by changing the frequency amplitude or phase of the radio signal
Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)
42
Modulation Techniques
bull Digital Benefits Clearer audio throughout system coverage
area
Improved radio frequency efficiency
Improved system coverage
Imbedded signaling options
Encryption with no range loss
43
Voting Receiver Technology
In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site
In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip
hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip
hellipwhich may be stronger than the original signal
44
Voting Receiver Systems
Site 1
Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5f1 f2 f3 f4 f5
Comparator
Received audio to System
45
Discussionamp
Questions
Slide Number 1
Presentation Agenda
ldquoTrunking 101rdquo
What is ldquoTrunkingrdquo
Conventional vs Trunked
Slide Number 6
Slide Number 7
Your Bank Tellers ndash as ldquoConventionalrdquo
Conventional vs Trunked
Trunked Radio Systems
Conventional vs Trunked
Conventional vs Trunked
Basic Trunking Diagram
Your Bank Tellers ndash as ldquoTrunkedrdquo
Conventional vs Trunked
So How Does It Work
Control Channel continuously transmits system data to all radios
Radio user presses TX button and radio information is sent via control channel to Central Controller
Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
When transmission is completed all units revert back to Control Channel
Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
Fire amp EMS Talk Groups
Questionshellipso far
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Kandiyohi Co MN ndash with Simulcast
Slide Number 31
Simulcast Issues
Simulcast Issues
Discussion and questions regarding Simulcast transmission techniques and issues
Multicast Transmitting Systems
Multicast Transmitting Systems
Kandiyohi Co MN ndash with Multicast
ARMER System
Slide Number 39
Radio System Modulation Technologies
Modulation Techniques
Modulation Techniques
Voting Receiver Technology
Voting Receiver Systems
DiscussionampQuestions
35
Multicast Transmitting Systems
Multicast Transmitting is defined as bull A radio system where different radio
frequencies are used at each tower site within the radio system
Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost
36
Multicast Transmitting Systems
Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its
own set of frequencies)bull No Simulcast coverage benefits (overlap
voting)bull Units ldquoroamrdquo between sites
37
f1 f2 f3 f4 f5
f6 f7 f8 f9 f10
Kandiyohi Co MN ndash with Multicast
38
ARMER System
In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link
Typical ARMER tower site is Multicast Typical Local Ehancement system is
Simulcast
39
Zone Controller
40
Radio System Modulation Technologies
bull Analog vs DigitalMost existing Public Safety radio
systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why
41
Modulation Techniques
Analog transmission
Digital transmission
Information is sent by changing the frequency amplitude or phase of the radio signal
Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)
42
Modulation Techniques
bull Digital Benefits Clearer audio throughout system coverage
area
Improved radio frequency efficiency
Improved system coverage
Imbedded signaling options
Encryption with no range loss
43
Voting Receiver Technology
In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site
In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip
hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip
hellipwhich may be stronger than the original signal
44
Voting Receiver Systems
Site 1
Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5f1 f2 f3 f4 f5
Comparator
Received audio to System
45
Discussionamp
Questions
Slide Number 1
Presentation Agenda
ldquoTrunking 101rdquo
What is ldquoTrunkingrdquo
Conventional vs Trunked
Slide Number 6
Slide Number 7
Your Bank Tellers ndash as ldquoConventionalrdquo
Conventional vs Trunked
Trunked Radio Systems
Conventional vs Trunked
Conventional vs Trunked
Basic Trunking Diagram
Your Bank Tellers ndash as ldquoTrunkedrdquo
Conventional vs Trunked
So How Does It Work
Control Channel continuously transmits system data to all radios
Radio user presses TX button and radio information is sent via control channel to Central Controller
Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
When transmission is completed all units revert back to Control Channel
Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
Fire amp EMS Talk Groups
Questionshellipso far
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Kandiyohi Co MN ndash with Simulcast
Slide Number 31
Simulcast Issues
Simulcast Issues
Discussion and questions regarding Simulcast transmission techniques and issues
Multicast Transmitting Systems
Multicast Transmitting Systems
Kandiyohi Co MN ndash with Multicast
ARMER System
Slide Number 39
Radio System Modulation Technologies
Modulation Techniques
Modulation Techniques
Voting Receiver Technology
Voting Receiver Systems
DiscussionampQuestions
36
Multicast Transmitting Systems
Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its
own set of frequencies)bull No Simulcast coverage benefits (overlap
voting)bull Units ldquoroamrdquo between sites
37
f1 f2 f3 f4 f5
f6 f7 f8 f9 f10
Kandiyohi Co MN ndash with Multicast
38
ARMER System
In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link
Typical ARMER tower site is Multicast Typical Local Ehancement system is
Simulcast
39
Zone Controller
40
Radio System Modulation Technologies
bull Analog vs DigitalMost existing Public Safety radio
systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why
41
Modulation Techniques
Analog transmission
Digital transmission
Information is sent by changing the frequency amplitude or phase of the radio signal
Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)
42
Modulation Techniques
bull Digital Benefits Clearer audio throughout system coverage
area
Improved radio frequency efficiency
Improved system coverage
Imbedded signaling options
Encryption with no range loss
43
Voting Receiver Technology
In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site
In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip
hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip
hellipwhich may be stronger than the original signal
44
Voting Receiver Systems
Site 1
Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5f1 f2 f3 f4 f5
Comparator
Received audio to System
45
Discussionamp
Questions
Slide Number 1
Presentation Agenda
ldquoTrunking 101rdquo
What is ldquoTrunkingrdquo
Conventional vs Trunked
Slide Number 6
Slide Number 7
Your Bank Tellers ndash as ldquoConventionalrdquo
Conventional vs Trunked
Trunked Radio Systems
Conventional vs Trunked
Conventional vs Trunked
Basic Trunking Diagram
Your Bank Tellers ndash as ldquoTrunkedrdquo
Conventional vs Trunked
So How Does It Work
Control Channel continuously transmits system data to all radios
Radio user presses TX button and radio information is sent via control channel to Central Controller
Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
When transmission is completed all units revert back to Control Channel
Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
Fire amp EMS Talk Groups
Questionshellipso far
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Kandiyohi Co MN ndash with Simulcast
Slide Number 31
Simulcast Issues
Simulcast Issues
Discussion and questions regarding Simulcast transmission techniques and issues
Multicast Transmitting Systems
Multicast Transmitting Systems
Kandiyohi Co MN ndash with Multicast
ARMER System
Slide Number 39
Radio System Modulation Technologies
Modulation Techniques
Modulation Techniques
Voting Receiver Technology
Voting Receiver Systems
DiscussionampQuestions
37
f1 f2 f3 f4 f5
f6 f7 f8 f9 f10
Kandiyohi Co MN ndash with Multicast
38
ARMER System
In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link
Typical ARMER tower site is Multicast Typical Local Ehancement system is
Simulcast
39
Zone Controller
40
Radio System Modulation Technologies
bull Analog vs DigitalMost existing Public Safety radio
systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why
41
Modulation Techniques
Analog transmission
Digital transmission
Information is sent by changing the frequency amplitude or phase of the radio signal
Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)
42
Modulation Techniques
bull Digital Benefits Clearer audio throughout system coverage
area
Improved radio frequency efficiency
Improved system coverage
Imbedded signaling options
Encryption with no range loss
43
Voting Receiver Technology
In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site
In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip
hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip
hellipwhich may be stronger than the original signal
44
Voting Receiver Systems
Site 1
Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5f1 f2 f3 f4 f5
Comparator
Received audio to System
45
Discussionamp
Questions
Slide Number 1
Presentation Agenda
ldquoTrunking 101rdquo
What is ldquoTrunkingrdquo
Conventional vs Trunked
Slide Number 6
Slide Number 7
Your Bank Tellers ndash as ldquoConventionalrdquo
Conventional vs Trunked
Trunked Radio Systems
Conventional vs Trunked
Conventional vs Trunked
Basic Trunking Diagram
Your Bank Tellers ndash as ldquoTrunkedrdquo
Conventional vs Trunked
So How Does It Work
Control Channel continuously transmits system data to all radios
Radio user presses TX button and radio information is sent via control channel to Central Controller
Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
When transmission is completed all units revert back to Control Channel
Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
Fire amp EMS Talk Groups
Questionshellipso far
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Kandiyohi Co MN ndash with Simulcast
Slide Number 31
Simulcast Issues
Simulcast Issues
Discussion and questions regarding Simulcast transmission techniques and issues
Multicast Transmitting Systems
Multicast Transmitting Systems
Kandiyohi Co MN ndash with Multicast
ARMER System
Slide Number 39
Radio System Modulation Technologies
Modulation Techniques
Modulation Techniques
Voting Receiver Technology
Voting Receiver Systems
DiscussionampQuestions
38
ARMER System
In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link
Typical ARMER tower site is Multicast Typical Local Ehancement system is
Simulcast
39
Zone Controller
40
Radio System Modulation Technologies
bull Analog vs DigitalMost existing Public Safety radio
systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why
41
Modulation Techniques
Analog transmission
Digital transmission
Information is sent by changing the frequency amplitude or phase of the radio signal
Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)
42
Modulation Techniques
bull Digital Benefits Clearer audio throughout system coverage
area
Improved radio frequency efficiency
Improved system coverage
Imbedded signaling options
Encryption with no range loss
43
Voting Receiver Technology
In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site
In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip
hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip
hellipwhich may be stronger than the original signal
44
Voting Receiver Systems
Site 1
Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5f1 f2 f3 f4 f5
Comparator
Received audio to System
45
Discussionamp
Questions
Slide Number 1
Presentation Agenda
ldquoTrunking 101rdquo
What is ldquoTrunkingrdquo
Conventional vs Trunked
Slide Number 6
Slide Number 7
Your Bank Tellers ndash as ldquoConventionalrdquo
Conventional vs Trunked
Trunked Radio Systems
Conventional vs Trunked
Conventional vs Trunked
Basic Trunking Diagram
Your Bank Tellers ndash as ldquoTrunkedrdquo
Conventional vs Trunked
So How Does It Work
Control Channel continuously transmits system data to all radios
Radio user presses TX button and radio information is sent via control channel to Central Controller
Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
When transmission is completed all units revert back to Control Channel
Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
Fire amp EMS Talk Groups
Questionshellipso far
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Kandiyohi Co MN ndash with Simulcast
Slide Number 31
Simulcast Issues
Simulcast Issues
Discussion and questions regarding Simulcast transmission techniques and issues
Multicast Transmitting Systems
Multicast Transmitting Systems
Kandiyohi Co MN ndash with Multicast
ARMER System
Slide Number 39
Radio System Modulation Technologies
Modulation Techniques
Modulation Techniques
Voting Receiver Technology
Voting Receiver Systems
DiscussionampQuestions
39
Zone Controller
40
Radio System Modulation Technologies
bull Analog vs DigitalMost existing Public Safety radio
systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why
41
Modulation Techniques
Analog transmission
Digital transmission
Information is sent by changing the frequency amplitude or phase of the radio signal
Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)
42
Modulation Techniques
bull Digital Benefits Clearer audio throughout system coverage
area
Improved radio frequency efficiency
Improved system coverage
Imbedded signaling options
Encryption with no range loss
43
Voting Receiver Technology
In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site
In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip
hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip
hellipwhich may be stronger than the original signal
44
Voting Receiver Systems
Site 1
Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5f1 f2 f3 f4 f5
Comparator
Received audio to System
45
Discussionamp
Questions
Slide Number 1
Presentation Agenda
ldquoTrunking 101rdquo
What is ldquoTrunkingrdquo
Conventional vs Trunked
Slide Number 6
Slide Number 7
Your Bank Tellers ndash as ldquoConventionalrdquo
Conventional vs Trunked
Trunked Radio Systems
Conventional vs Trunked
Conventional vs Trunked
Basic Trunking Diagram
Your Bank Tellers ndash as ldquoTrunkedrdquo
Conventional vs Trunked
So How Does It Work
Control Channel continuously transmits system data to all radios
Radio user presses TX button and radio information is sent via control channel to Central Controller
Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
When transmission is completed all units revert back to Control Channel
Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
Fire amp EMS Talk Groups
Questionshellipso far
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Kandiyohi Co MN ndash with Simulcast
Slide Number 31
Simulcast Issues
Simulcast Issues
Discussion and questions regarding Simulcast transmission techniques and issues
Multicast Transmitting Systems
Multicast Transmitting Systems
Kandiyohi Co MN ndash with Multicast
ARMER System
Slide Number 39
Radio System Modulation Technologies
Modulation Techniques
Modulation Techniques
Voting Receiver Technology
Voting Receiver Systems
DiscussionampQuestions
40
Radio System Modulation Technologies
bull Analog vs DigitalMost existing Public Safety radio
systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why
41
Modulation Techniques
Analog transmission
Digital transmission
Information is sent by changing the frequency amplitude or phase of the radio signal
Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)
42
Modulation Techniques
bull Digital Benefits Clearer audio throughout system coverage
area
Improved radio frequency efficiency
Improved system coverage
Imbedded signaling options
Encryption with no range loss
43
Voting Receiver Technology
In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site
In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip
hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip
hellipwhich may be stronger than the original signal
44
Voting Receiver Systems
Site 1
Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5f1 f2 f3 f4 f5
Comparator
Received audio to System
45
Discussionamp
Questions
Slide Number 1
Presentation Agenda
ldquoTrunking 101rdquo
What is ldquoTrunkingrdquo
Conventional vs Trunked
Slide Number 6
Slide Number 7
Your Bank Tellers ndash as ldquoConventionalrdquo
Conventional vs Trunked
Trunked Radio Systems
Conventional vs Trunked
Conventional vs Trunked
Basic Trunking Diagram
Your Bank Tellers ndash as ldquoTrunkedrdquo
Conventional vs Trunked
So How Does It Work
Control Channel continuously transmits system data to all radios
Radio user presses TX button and radio information is sent via control channel to Central Controller
Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
When transmission is completed all units revert back to Control Channel
Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
Fire amp EMS Talk Groups
Questionshellipso far
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Kandiyohi Co MN ndash with Simulcast
Slide Number 31
Simulcast Issues
Simulcast Issues
Discussion and questions regarding Simulcast transmission techniques and issues
Multicast Transmitting Systems
Multicast Transmitting Systems
Kandiyohi Co MN ndash with Multicast
ARMER System
Slide Number 39
Radio System Modulation Technologies
Modulation Techniques
Modulation Techniques
Voting Receiver Technology
Voting Receiver Systems
DiscussionampQuestions
41
Modulation Techniques
Analog transmission
Digital transmission
Information is sent by changing the frequency amplitude or phase of the radio signal
Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)
42
Modulation Techniques
bull Digital Benefits Clearer audio throughout system coverage
area
Improved radio frequency efficiency
Improved system coverage
Imbedded signaling options
Encryption with no range loss
43
Voting Receiver Technology
In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site
In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip
hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip
hellipwhich may be stronger than the original signal
44
Voting Receiver Systems
Site 1
Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5f1 f2 f3 f4 f5
Comparator
Received audio to System
45
Discussionamp
Questions
Slide Number 1
Presentation Agenda
ldquoTrunking 101rdquo
What is ldquoTrunkingrdquo
Conventional vs Trunked
Slide Number 6
Slide Number 7
Your Bank Tellers ndash as ldquoConventionalrdquo
Conventional vs Trunked
Trunked Radio Systems
Conventional vs Trunked
Conventional vs Trunked
Basic Trunking Diagram
Your Bank Tellers ndash as ldquoTrunkedrdquo
Conventional vs Trunked
So How Does It Work
Control Channel continuously transmits system data to all radios
Radio user presses TX button and radio information is sent via control channel to Central Controller
Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
When transmission is completed all units revert back to Control Channel
Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
Fire amp EMS Talk Groups
Questionshellipso far
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Kandiyohi Co MN ndash with Simulcast
Slide Number 31
Simulcast Issues
Simulcast Issues
Discussion and questions regarding Simulcast transmission techniques and issues
Multicast Transmitting Systems
Multicast Transmitting Systems
Kandiyohi Co MN ndash with Multicast
ARMER System
Slide Number 39
Radio System Modulation Technologies
Modulation Techniques
Modulation Techniques
Voting Receiver Technology
Voting Receiver Systems
DiscussionampQuestions
42
Modulation Techniques
bull Digital Benefits Clearer audio throughout system coverage
area
Improved radio frequency efficiency
Improved system coverage
Imbedded signaling options
Encryption with no range loss
43
Voting Receiver Technology
In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site
In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip
hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip
hellipwhich may be stronger than the original signal
44
Voting Receiver Systems
Site 1
Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5f1 f2 f3 f4 f5
Comparator
Received audio to System
45
Discussionamp
Questions
Slide Number 1
Presentation Agenda
ldquoTrunking 101rdquo
What is ldquoTrunkingrdquo
Conventional vs Trunked
Slide Number 6
Slide Number 7
Your Bank Tellers ndash as ldquoConventionalrdquo
Conventional vs Trunked
Trunked Radio Systems
Conventional vs Trunked
Conventional vs Trunked
Basic Trunking Diagram
Your Bank Tellers ndash as ldquoTrunkedrdquo
Conventional vs Trunked
So How Does It Work
Control Channel continuously transmits system data to all radios
Radio user presses TX button and radio information is sent via control channel to Central Controller
Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
When transmission is completed all units revert back to Control Channel
Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
Fire amp EMS Talk Groups
Questionshellipso far
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Kandiyohi Co MN ndash with Simulcast
Slide Number 31
Simulcast Issues
Simulcast Issues
Discussion and questions regarding Simulcast transmission techniques and issues
Multicast Transmitting Systems
Multicast Transmitting Systems
Kandiyohi Co MN ndash with Multicast
ARMER System
Slide Number 39
Radio System Modulation Technologies
Modulation Techniques
Modulation Techniques
Voting Receiver Technology
Voting Receiver Systems
DiscussionampQuestions
43
Voting Receiver Technology
In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site
In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip
hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip
hellipwhich may be stronger than the original signal
44
Voting Receiver Systems
Site 1
Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5f1 f2 f3 f4 f5
Comparator
Received audio to System
45
Discussionamp
Questions
Slide Number 1
Presentation Agenda
ldquoTrunking 101rdquo
What is ldquoTrunkingrdquo
Conventional vs Trunked
Slide Number 6
Slide Number 7
Your Bank Tellers ndash as ldquoConventionalrdquo
Conventional vs Trunked
Trunked Radio Systems
Conventional vs Trunked
Conventional vs Trunked
Basic Trunking Diagram
Your Bank Tellers ndash as ldquoTrunkedrdquo
Conventional vs Trunked
So How Does It Work
Control Channel continuously transmits system data to all radios
Radio user presses TX button and radio information is sent via control channel to Central Controller
Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
When transmission is completed all units revert back to Control Channel
Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
Fire amp EMS Talk Groups
Questionshellipso far
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Kandiyohi Co MN ndash with Simulcast
Slide Number 31
Simulcast Issues
Simulcast Issues
Discussion and questions regarding Simulcast transmission techniques and issues
Multicast Transmitting Systems
Multicast Transmitting Systems
Kandiyohi Co MN ndash with Multicast
ARMER System
Slide Number 39
Radio System Modulation Technologies
Modulation Techniques
Modulation Techniques
Voting Receiver Technology
Voting Receiver Systems
DiscussionampQuestions
44
Voting Receiver Systems
Site 1
Site 2
Site 3
f1 f2 f3 f4 f5
f1 f2 f3 f4 f5f1 f2 f3 f4 f5
Comparator
Received audio to System
45
Discussionamp
Questions
Slide Number 1
Presentation Agenda
ldquoTrunking 101rdquo
What is ldquoTrunkingrdquo
Conventional vs Trunked
Slide Number 6
Slide Number 7
Your Bank Tellers ndash as ldquoConventionalrdquo
Conventional vs Trunked
Trunked Radio Systems
Conventional vs Trunked
Conventional vs Trunked
Basic Trunking Diagram
Your Bank Tellers ndash as ldquoTrunkedrdquo
Conventional vs Trunked
So How Does It Work
Control Channel continuously transmits system data to all radios
Radio user presses TX button and radio information is sent via control channel to Central Controller
Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
When transmission is completed all units revert back to Control Channel
Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
Fire amp EMS Talk Groups
Questionshellipso far
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Kandiyohi Co MN ndash with Simulcast
Slide Number 31
Simulcast Issues
Simulcast Issues
Discussion and questions regarding Simulcast transmission techniques and issues
Multicast Transmitting Systems
Multicast Transmitting Systems
Kandiyohi Co MN ndash with Multicast
ARMER System
Slide Number 39
Radio System Modulation Technologies
Modulation Techniques
Modulation Techniques
Voting Receiver Technology
Voting Receiver Systems
DiscussionampQuestions
45
Discussionamp
Questions
Slide Number 1
Presentation Agenda
ldquoTrunking 101rdquo
What is ldquoTrunkingrdquo
Conventional vs Trunked
Slide Number 6
Slide Number 7
Your Bank Tellers ndash as ldquoConventionalrdquo
Conventional vs Trunked
Trunked Radio Systems
Conventional vs Trunked
Conventional vs Trunked
Basic Trunking Diagram
Your Bank Tellers ndash as ldquoTrunkedrdquo
Conventional vs Trunked
So How Does It Work
Control Channel continuously transmits system data to all radios
Radio user presses TX button and radio information is sent via control channel to Central Controller
Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
When transmission is completed all units revert back to Control Channel
Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
Fire amp EMS Talk Groups
Questionshellipso far
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Simulcast Transmitting Systems
Kandiyohi Co MN ndash with Simulcast
Slide Number 31
Simulcast Issues
Simulcast Issues
Discussion and questions regarding Simulcast transmission techniques and issues