Slide 5-1
EN
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D 1
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LZU 103 506
Switching and SignalingSwitching and Signaling
Slide 5-2
EN
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D 1
09 0
015
LZU 103 506
Main System Parts
Subscribersignaling and
switchingequipment
Groupswitchingnetwork
Trunk &signaling.
equip-ment
Trunks
Remotesubsc.switch
Terminalequip-ment
Regionalprocessors
RegionalprocessorsEMRP
SupportprocessorsCentral
processor
In / Out
0038B
Slide 5-3
EN
/FA
D 1
09 0
015
LZU 103 506
Section 1 Objectives
Upon completion of this section, the student will be able to:
• Describe the structure of SSS and the capacities of the Line SwitchModules and the Extension Module Groups.
• Describe the main operating functions of the Line Switch Module in theSubscriber Switching Subsystem (SSS).
• Describe how Extension Module Groups are used in Remote and LocalSubscriber Switch applications.
• Describe the different modes of operation associated with the ExtensionSwitch Module
• List the basic steps involved with call flow through the local and remotesubscriber stage.
• Describe the Special Equipment Coin Box Magazine
Slide 5-4
EN
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D 1
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LZU 103 506
Main Functions of SSS
• Setup and release of call connections
• Supervision of the state of subscriber lines
• Analog-to-digital conversion
• Subscriber line signaling, such as ringing current
Slide 5-5
EN
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D 1
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015
LZU 103 506
Extension Module Groups (EMGs)
LSM-0
LSM-15
TSB
EMG
GS
EMRPB
0
127
2047
EMG
SSS0
2047 EMG
EMG
EMG
GS
TRUNKDEVICES
SSS0075
Slide 5-6
EN
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D 1
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015
LZU 103 506
Functions of the LSM
BISS
TSC
CLD/CLS
EMTS
KRC
ABS
0 1 2 3
L I B s
14 15
SLCT
ETB/JTC
EMRP
ETB/JTC
LLR
REU
POU
0
2
4
6
1
3
5
7
TIPRING
EMRP Bus
Address plug
Cable toMDFTSB A & B
LSM
Slide 5-7
EN
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D 1
09 0
015
LZU 103 506
Units of the LSM
BISS
TSC
CLD/CLS
EMTS
KRC
ABS
0 1 2 3
L I B s
14 15
SLCT
ETB/JTC
EMRP
ETB/JTC
LLR
REU
POU
0
2
4
6
1
3
5
7
TIPRING
EMRP Bus
Address plug
Cable toMDFTSB A & B
LSM
Slide 5-8
EN
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D 1
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015
LZU 103 506
Units in a ACA3 LSM Magazine
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ !T!K!A!L!L!L!L!L!L!L!L!L!L!L!L!L!L!L!L!S!E!E!E!E!R!P! !S!R!B!I!I!I!I!I!I!I!I!I!I!I!I!I!I!I!I!L!T!T!T!M!E!O! !W!3!S!C!C!C!C!C!C!C!C!C!C!C!C!C!C!C!C!C!B!B!B!R!U!U! ! !C!C! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !T! ! ! !P! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !3! ! ! ! ! ! ! ! ! ! !0!1!2!3!4!5!6!7!8!9!1!1!1!1!1!1! !0!1!2! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !0!1!2!3!4!5! ! ! ! ! ! ! ! +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Slide 5-9
EN
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D 1
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LZU 103 506
SubscriberSwitchingSubsystemSSS
KRC
LIB(LIC's)
EMTS
JTC
EMRP
LSM0
SECOB EMRP
SETPL EMRP
SE
SE
SSS-Local
EMG32Channel
EMRP A
RPBC
SSS0010
EMRP B
Slide 5-10
EN
/FA
D 1
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015
LZU 103 506
KRC ConnectionLSM
LIB
EMTS
LSM
TSB
LIBEMTS
KRC
Slide 5-11
EN
/FA
D 1
09 0
015
LZU 103 506
Types of Auxiliary Equipment in SSS
EMRP
EMRP
EMRP
EMRP
STR STR
LIC
SLCT REU
SE
SULT
IOIMExternalAlarms
I/O Device
Slide 5-12
EN
/FA
D 1
09 0
015
LZU 103 506
Device Processors in LSM Controlled by EMRP
LIC LIB
DP
LIC LIB
KRCDP
ETBDP
EMTS
DP DP
EMRP
DEVCBDEVCB DEVCB
DEVCB
To/fromcentral software
To/fromGSS
LSM(EM)
0814C
Slide 5-13
EN
/FA
D 1
09 0
015
LZU 103 506
RemoteSubscriberStage
LIC
EMTSKRC ETB
EMRP
0
127
LSM 0
LIC
EMTSKRC ETB
EMRP
0
127
LSM 1
LIC
EMTSKRC ETB
EMRP
0
127
LSM 2
LIC
EMTSKRC ETB
EMRP
0
127
LSM 3
TSB-B
TSB-A
PCM - line to/from GSSin host office
PCM - line to/from GSSin host office
PCM - line to/from GSSin host office
0812A
Slide 5-14
EN
/FA
D 1
09 0
015
LZU 103 506
Signaling Between RSS and CP
EMRP
EMRP
EMRP
ETB
ETB
STR STR
Signals
Signals
EMRPB-A
EMRPB-B
23 8 0... ...
Signals
... ...23 8 0
PCM line
PCM line
ETC
ETC
Signals
SignalsSignals
STC
CP
RPB
GSS
STC
Slide 5-15
EN
/FA
D 1
09 0
015
LZU 103 506
SSS in Host Office
EMRP
EMRP
EMRP
CP
RPB
GSS
0815A
EMRPB
RPBC RPBC
JTC
JTC
JTC
Slide 5-16
EN
/FA
D 1
09 0
015
LZU 103 506
Extension Switch Module
EMRP
ETBEMTSKRC
ET
EMRP
ETBEMTSKRC
ET
EMRP
ETBEMTSKRC
ET
IDLC
ANALOG
96SUBSCRIBERS
DIGITALESM-0
ESM-1
ESM-15
81463A
Slide 5-17
EN
/FA
D 1
09 0
015
LZU 103 506
Operation Mode 1
24Channels
24Channels
24Channels
24Channels
RTET
DDL
DDL
DDL
DDL
DDL
ET
ET
ET
ETProtection Link
T1 Link D
T1 Link C
T1 Link B
T1 Link A
95
0
SubscriberLines
ESM
Slide 5-18
EN
/FA
D 1
09 0
015
LZU 103 506
Operation Mode 2
24Channels
24Channels
24Channels
24Channels
RT
ET
DDL
Protection Link
T1 Link
95
0
SubscriberLines
ESM
T1 Link
DigitalConcen-
trator2:1
DigitalConcen-
trator2:1
ET
DDL
ET
DDL
Slide 5-19
EN
/FA
D 1
09 0
015
LZU 103 506
Operation Mode 3
24Channels
24Channels
24Channels
24Channels
RT
ET
DDL
Protection Link
T1 Link
47
0
SubscriberLines
ESM
T1 Link
Multi-plex1:1 ET
DDL
ET
DDL
Multi-plex1:1
81476A
Slide 5-20
EN
/FA
D 1
09 0
015
LZU 103 506
ESM Magazine Layout
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |B|T|C|K|S|S|S|S|S|S|S|S|S|S|S|J|J|E|B|P| |I|S|L|R|L|L|L|L|L|L|L|L|L|L|L|T|T|M|O|O| |S|C|D|3|C|C|C|C|C|C|C|C|C|C|C|C|C|R|O|U| |S| | |C|E|D|E|D|E|D|E|D|E|D|B| | |P|S| | | | | | |T|D|T|D|T|D|T|D|T|D|P| | | |T| | | | | | |C|L|C|L|C|L|C|L|C|L|T| | | |E| | | | | | | |C| |C| |C| |C| |C|C| | | |R| | | | | | | | | | | | | | | | | | | | | | | | | | | |A|A|B|B|C|C|D|D|P|P| |0|1| | | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Slide 5-21
EN
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D 1
09 0
015
LZU 103 506
SLCT
KR
LIC
EMTS
JTCEMRP03/01
SLCT
KR
LIC
EMTS
JTC
EMRP03/02
SLCT
KR
LIC
EMTS
JTCEMRP03/03
SLCT
LIC
EMTS
EMRP03/16
LSM-1
LSM-0
LSM-2
LSM-15
SETPL EMRPSE
SECOBEMRPSE
GSS
RPBC RPBC
RP BUS
CP-A CP-B
EMG LSS0
TIME SWITCH BUS "B"TIME SWITCH BUS "A"
EMRP BUS "B"EMRP BUS "A"
SSS0014
LocalSubscriberSwitchingStageLSS
Slide 5-22
EN
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D 1
09 0
015
LZU 103 506
RemoteSubscriberStage
SLCT
KR
LIC
EMTS
ETB
EMRP03/01
SLCT
KR
LIC
EMTS
ETB
EMRP03/02
SLCT
KR
LIC
EMTS
ETB
EMRP03/03
SLCT
LIC
EMTS
EMRP03/16
LSM-1
LSM-0
LSM-2
LSM-15
SETPL EMRPSE
SECOB EMRPSE
EMG RSS0
EMRP BUS "B"EMRP BUS "A"
STR
STR
T16R
STC STC RP RP
P-BCP-A
T1-24 Channel
T1-24 Channel
T1-24 Channel
ETC
ETC
ETC
T16C
RP BUS
GSS
TIME SWITCH BUS "A"TIME SWITCH BUS "B"
Slide 5-23
EN
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D 1
09 0
015
LZU 103 506
Magazine Layout (32 Line)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ !P!P!D!S!S!D!S!S!D!S!S!D!S!S!E!D!S!S!D!S!S!D!S!S!D!S!S!P! !O!O!E!E!E!E!E!E!E!E!E!E!E!E!M!E!E!E!E!E!E!E!E!E!E!E!E!O! !U!U!V!C!C!V!C!C!V!C!C!V!C!C!R!V!C!C!V!C!C!V!C!C!V!C!C!U! ! ! !P!O!O!P!O!O!P!O!O!P!O!O!P!P!O!O!P!O!O!P!O!O!P!O!O! ! ! ! ! !B!B! !B!B! !B!B! !B!B! ! !B!B! !B!B! !B!B! !B!B! ! ! ! ! !C!C! !C!C! !C!C! !C!C! ! !C!C! !C!C! !C!C! !C!C! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !0!0!2!1!4!6!2!8!1!3!1!1! !4!1!1!5!2!2!6!2!2!7!2!3! ! ! ! ! ! ! ! ! ! ! ! !0! !2!4! ! !6!8! !0!2! !4!6! !8!0! ! ! ! ! !-!-! !-!-! !-!-! !-!-! ! !-!-! !-!-! !-!-! !-!-! ! ! ! ! !1!3! !5!7! !9!1! !1!1! ! !1!1! !2!2! !2!2! !2!3! ! ! ! ! ! ! ! ! ! ! ! !1! !3!5! ! !7!9! !1!3! !5!7! !9!1! ! +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Slide 5-24
EN
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D 1
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015
LZU 103 506
Magazine Layout (16 Line)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ !P!P!D!S!S!D!S!S!E!D!S!S!D!S!S!C!P! !O!O!E!E!E!E!E!E!M!E!E!E!E!E!E!L!O! !U!U!V!C!C!V!C!C!R!V!C!C!V!C!C!C!U! ! ! !P!O!O!P!O!O!P!P!O!O!P!O!O!T! ! ! ! ! !B!B! !B!B! ! !B!B! !B!B! ! ! ! ! ! !C!C! !C!C! ! !C!C! !C!C! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !0!0!2!1!4!6! !2!8!1!3!1!1!1! ! ! ! ! ! ! ! ! ! ! ! ! !0! !2!4! ! ! ! ! ! !-!-! !-!-! ! !-!-! !-!-! ! ! ! ! ! !1!3! !5!7! ! !9!1! !1!1! ! ! ! ! ! ! ! ! ! ! ! ! ! !1! !3!5! ! ! +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Slide 5-25
EN
/FA
D 1
09 0
015
LZU 103 506
SECOB Magazine Layout (16 Line)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ !P!P!D!S!S!D!S!S!E!D!S!S!D!S!S!C!P! !O!O!E!E!E!E!E!E!M!E!E!E!E!E!E!L!O! !U!U!V!C!C!V!C!C!R!V!C!C!V!C!C!C!U! ! ! !P!O!O!P!O!O!P!P!O!O!P!O!O!T! ! ! ! ! !B!B! !B!B! ! !B!B! !B!B! ! ! ! ! ! !C!C! !C!C! ! !C!C! !C!C! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !0!0!2!1!4!6! !2!8!1!3!1!1!1! ! ! ! ! ! ! ! ! ! ! ! ! !0! !2!4! ! ! ! ! ! !-!-! !-!-! ! !-!-! !-!-! ! ! ! ! ! !1!3! !5!7! ! !9!1! !1!1! ! ! ! ! ! ! ! ! ! ! ! ! ! !1! !3!5! ! ! +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Slide 5-26
EN
/FA
D 1
09 0
015
LZU 103 506
SECOB Magazine Layout (32 Line)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ !P!P!D!S!S!D!S!S!D!S!S!D!S!S!E!D!S!S!D!S!S!D!S!S!D!S!S!P! !O!O!E!E!E!E!E!E!E!E!E!E!E!E!M!E!E!E!E!E!E!E!E!E!E!E!E!O! !U!U!V!C!C!V!C!C!V!C!C!V!C!C!R!V!C!C!V!C!C!V!C!C!V!C!C!U! ! ! !P!O!O!P!O!O!P!O!O!P!O!O!P!P!O!O!P!O!O!P!O!O!P!O!O! ! ! ! ! !B!B! !B!B! !B!B! !B!B! ! !B!B! !B!B! !B!B! !B!B! ! ! ! ! !C!C! !C!C! !C!C! !C!C! ! !C!C! !C!C! !C!C! !C!C! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !0!0!2!1!4!6!2!8!1!3!1!1! !4!1!1!5!2!2!6!2!2!7!2!3! ! ! ! ! ! ! ! ! ! ! ! !0! !2!4! ! !6!8! !0!2! !4!6! !8!0! ! ! ! ! !-!-! !-!-! !-!-! !-!-! ! !-!-! !-!-! !-!-! !-!-! ! ! ! ! !1!3! !5!7! !9!1! !1!1! ! !1!1! !2!2! !2!2! !2!3! ! ! ! ! ! ! ! ! ! ! ! !1! !3!5! ! !7!9! !1!3! !5!7! !9!1! ! +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Slide 5-27
EN
/FA
D 1
09 0
015
LZU 103 506
Section 1 Objectives Review
Upon completion of this section, the student will be able to:
• Describe the structure of SSS and the capacities of the Line SwitchModules and the Extension Module Groups.
• Describe the main operating functions of the Line Switch Module in theSubscriber Switching Subsystem (SSS).
• Describe how Extension Module Groups are used in Remote and LocalSubscriber Switch applications.
• Describe the different modes of operation associated with the ExtensionSwitch Module
• List the basic steps involved with call flow through the local and remotesubscriber stage.
• Describe the Special Equipment Coin Box Magazine
Slide 5-28
EN
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D 1
09 0
015
LZU 103 506
Section 2 Objectives
Upon completion of this lesson, the student will be able to:
• Describe the main functions of the Group Switching Subsystem (GSS)• List the main components of the Group Switching Subsystem (GSS).• Explain the operating principle of the switching network when connecting
and disconnecting a speech path between two subscribers.
• Describe digital paths and how they are connected to the Time SwitchModule (TSM).
• Explain why the switching network is duplicated as plane A and plane B.• Explain the reason for having three clock modules and the importance of
network synchronization.
Slide 5-29
EN
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D 1
09 0
015
LZU 103 506
Main Functions of GSS
• Through-connection of a call
− Digital switching from one PCM link to another PCM link
− Connection within the SSS (intraoffice)
− Connection between SSS and TSS (interoffice)
• Clock maintenance and timing synchronization
Slide 5-30
EN
/FA
D 1
09 0
015
LZU 103 506
Group Switching Subsystem
Slide 5-31
EN
/FA
D 1
09 0
015
LZU 103 506
GSS andSubsystems
Slide 5-32
EN
/FA
D 1
09 0
015
LZU 103 506
SoundTransferEquipmentto GSS
Slide 5-33
EN
/FA
D 1
09 0
015
LZU 103 506
Digital Equipment
Slide 5-34
EN
/FA
D 1
09 0
015
LZU 103 506
GroupSwitchingSubsystemGSS
Slide 5-35
EN
/FA
D 1
09 0
015
LZU 103 506
Call Flow
Slide 5-36
EN
/FA
D 1
09 0
015
LZU 103 506
Call Flow
Slide 5-37
EN
/FA
D 1
09 0
015
LZU 103 506
Three-PartyCall
A
C
Group switch
B
CCD
A
C
Group switch
B
CCD
A
C
Group switch
B
CCD
Phase 1
The original call betweenthe calling (A) and called(B) subscriber. The CCDis passive.
Phase 2
The paths A-CCD, B-CCDand C-CCD are selected.The original path A-Bis still connected.
Phase 3
The paths A-CCD, B-CCD andC-CCD are established. Thepath A-B is disconnected and the original call nowhas a new member.
0614C
Slide 5-38
EN
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D 1
09 0
015
LZU 103 506
Duplication of GSD
0 12 31
ETC Digital Path B
0014A
Channel 12
0 3 31
ETC Digital Path E
Channel 3
TSM-A-0 SPM-A-0-0SSA
SSB12
TSM-A-1SSA
SSB
355
TSM-B-0 SPM-B-0-0SSA
SSB12
TSM-B-1SSA
SSB
355
Slide 5-39
EN
/FA
D 1
09 0
015
LZU 103 506
Clocking Introduction
Slide 5-40
EN
/FA
D 1
09 0
015
LZU 103 506
Network Synchronization Function Block
Slide 5-41
EN
/FA
D 1
09 0
015
LZU 103 506
Clock Module Function Block
Slide 5-42
EN
/FA
D 1
09 0
015
LZU 103 506
ClockingSynchronizesGS and SSS
Slide 5-43
EN
/FA
D 1
09 0
015
LZU 103 506
Supervision of the Group Switch
• Continuous Supervision of Disturbances in the Hardware
• Supervision by Traffic
• Routine Tests
Slide 5-44
EN
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D 1
09 0
015
LZU 103 506
64K Group Switch
TSM Group0
TSM Group3
DigitalPath
TSM0
TSM31
0
15
495
511
SPM0/0
0
31
16.384mult. pos.
0 31
SPM1/0
32
63
0 31
SPM0/1
0
31
32.768mult. pos.
32 63
SPM0/2
0
31
49.152mult. pos.
64 95
SPM0/3
0
31
65.536mult. pos.
96 127
Extension steps for SPM
SPM1/1
32
63
32 63
SPM1/2
32
63
64 95
SPM2/2
64
95
64 95
SPM2/1
64
95
32 63
SPM2/0
64
95
0 31
SPM1/3
32
63
96 127
SPM2/3
64
95
96 127
SPM3/264 95
SPM3/132 63
SPM3/0 0 31
SPM3/3
96127
96 127
96127127
9612796
TSM96
TSM127
1536
1551
2032
2047
0618B
Slide 5-45
EN
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D 1
09 0
015
LZU 103 506
Section 2 Objectives Review
Upon completion of this lesson, the student will be able to:
• Describe the main functions of the Group Switching Subsystem (GSS)• List the main components of the Group Switching Subsystem (GSS).• Explain the operating principle of the switching network when connecting
and disconnecting a speech path between two subscribers.
• Describe digital paths and how they are connected to the Time SwitchModule (TSM).
• Explain why the switching network is duplicated as plane A and plane B.• Explain the reason for having three clock modules and the importance of
network synchronization.
Slide 5-46
EN
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D 1
09 0
015
LZU 103 506
Section 3 Objectives
Upon completion of this section, the student will be able to:
• State the main functions of the Trunk and SignalingSubsystem (TSS).
• Identify the main function blocks of the TSS.
• State the purpose of the main function blocks of the TSS.
Slide 5-47
EN
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D 1
09 0
015
LZU 103 506
Main Functions of TSS
• Transmission and reception of voice and signaling to andfrom other exchanges
• Provision for all conversions required between external andinternal signals
Slide 5-48
EN
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D 1
09 0
015
LZU 103 506
Trunk andSignalingSubsystem
TSS
CR/CS
CSR
ASAM
ACSM
ET
BT
ETC
EM-CS/CR
CSR-D
AST--D8
AST--DP
PCDGSS
RP RP
RPB-A RPB-B
CPB-ACPB-B
24 CHANNELPCM TRUNK
Slide 5-49
EN
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D 1
09 0
015
LZU 103 506
Four 24-Channels to Three 32-Channels
GSSET24U board
TRUNK 24 CH
TRUNK 24 CH
TRUNK 24 CH
TRUNK 24 CH
ET24U board
ET24U board
ETBUFFU board
32 CH
8 CH
8 CH
32 CH
32 CH
8 CH
0490B
Slide 5-50
EN
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D 1
09 0
015
LZU 103 506
AnnouncementServiceTerminalComparison
Magazine Type AST-D4 AST-D8AST-DP
Function Block ASAM ASAM ASCM
Digital Trunks to GroupSwitch Network
4 2 1
Number of Circuit Boards 4 8 6
Maximum Number ofAnnouncements
4 8 Note 1
Maximum Length ofAnnouncements
32 sec. 32 sec. 360 sec.
Maximum Number ofSimultaneous Listeners
128 64 32
Maximum Length of aSpeech Phrase
32 sec. 32 sec. 60 sec.
Capability of Interface toExternal Announcement
Yes No No
Immediate Connection toBeginning of Announcement
No No Yes
Connection to Announcementin Progress
Yes Yes No
Delayed Connection toStart of Announcement
Yes Yes No
Capable of GeneratingTones Automatically
Yes Yes No
Slide 5-51
EN
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D 1
09 0
015
LZU 103 506
Auxiliary Services
• PCD• EM-CS/CR
Slide 5-52
EN
/FA
D 1
09 0
015
LZU 103 506
Section 3 Objectives Review
Upon completion of this section, the student will be able to:
• State the main functions of the Trunk and SignalingSubsystem (TSS).
• Identify the main function blocks of the TSS.
• State the purpose of the main function blocks of the TSS.