April 10, 2023VoIP Solutions that are MORE THAN JUST TALK
Survivability Challenges
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• Understanding the Challenge• Scenarios• Solutions approaches• End point dual registration in detail• Quick guide• A proposal to Elastix Community
Remote Office SurvivabilityAgenda
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The Challenge
Survivability
Problem Definition.
Many organizations deploying IP Telephony solutions are using a similar, very cost effective model where a central telephony server supports many IP/Ethernet-based phones in remote sites.
Recognizing the need for reliability, these companies are making their central IP-PBXs highly redundant, often deploying multiple servers for failover.
However, what happens if there's an issue on the WAN? Perhaps a circuit fails, or a routing loop occurs.
………… No matter how redundant your telephony server is, if your IP phones can't reach it, they lose dial-tone………………
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• Telephony is one of those facts of live that we take for granted (as the fact that we breadth without any conscientious control from ourselves)
• You take for granted that a dial tone will come up just picking up a handset, and you will be able to communicate to somebody else just after a few key strokes.
• Have you ever thought in what is the difference in impact for any organization when you have a few minutes service interruption on Internet access, or Accounting System Access compared with being a few minutes without phone service?.
…………………A “Survival Enabled” VoIP deployment is the one that has included a series of attributes and characteristics on all of the components, in the underlying infrastructure as well as all the distributed components……….
The Challenge
Survivability
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There is no such thing as a Survival Gateway, or a Survival Phone or even a Survival PBX….
…… there are a series of attributes for all of them to be able to have a Survivable designed solution…
Lets then Define:
• Online Mode. From the perspective of any SIP device, On Line Mode is when this device has full interaction and connectivity with the central point of arbitrage (IP PBX, UC Server, etc).
• Survival Mode. From the same perspective, is when the device loose the “advice/guidance” from the central site and now needs to take decisions by itself on how to process a request.
The Challenge
Survivability
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3 known and common approaches:
- Learning Outbound Proxy- B2BUA- Dual Registration
Scenarios of resolution
Survivability
WANWAN
PSTNPSTN
SIPx Server Farm
SECONDARYREG. SVR
PRIMARY REG. SVR
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WAN
WAN
PSTN
PSTN
SIPx Server Farm
SECONDARY
REG. SVR
PRIMARY REG. SVR•Learning Outbound Proxy:
- A local device in the Remote Location acts as the Outbound Proxy.
- It learns:• Who is registered and authenticated
where.• How calls are routed and treated
- You add:• Default Outbound routes for survival calls• How incoming calls are treated in survival
mode
Scenarios of Resolution
Survivability
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WANWAN
PSTN
PSTN
SIPx Server Farm
SECONDARY
REG. SVR
PRIMARY
REG. SVR•Back to Back User Agent
- A local entity provides all registration and authentication features for local sip devices.
- The local entity registers and replicates authentication requests to the central site on behalf of each local device
- Local Entity has rules to treat calls when outbound registration is not working
Scenarios of resolution
Survivability
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•Dual or Redundant registrar.- Each local device has 2 or more registrar
destinations for the same UA.- Each local Device is able to switch to a
secondary registrar/proxy when primary is not responding.
- Each local device is able to identify when primary registrar is back to normal
- One of the local SIP devices is able to provide the secondary server capabilities with basic telephony features
Scenarios of resolution
Survivability
WAN
WAN
PSTN
PSTN
SIPx Server Farm
SECONDARY
REG. SVR
PRIMARY REG. SVR
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Dual registrar in details
Survivability
WANWAN
PSTNPSTN
SIPx Server Farm
SECONDARYREG. SVR
PRIMARY REG. SVR
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Dual registrar in details
Survivability
WANWANSIPx Server
Farm
PSTNPSTNSECONDARYREG. SVR (1)
PRIMARY REG. SVR
SECONDARYREG. SVR (2)
VRRP or similar Redundant Router
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Dual registrar in details
Survivability
REPORTED REGISTERED REPORTED NON-REGISTERED
SER
VIC
E A
VA
ILA
BLE
NORMAL ONLINE STATUS (STAGE 1.1)
PENDING FOR FIRST SIP REQUEST AFTER SYSTEM
CAME BACK, OR NEXT RETRY REGISTRATION
(STAGE 1.4)
SER
VIC
E N
ON
-AV
AIL
AB
LE
TRANSITION AFTER MAIN SITE DOWN AND BEFORE
NEXT REGISTRATION OF SIP DEVICE
(STAGE 1.2)
NORMAL SURVIVAL MODE (STAGE 1.3)
PRIMARY REGISTRATION SERVER
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Dual Registrar – Reduce unstable stages
Survivability
Stage 1.2.Reduce expiration time for registration to a minimum value in the SIP end device.Having the phone (SIP end Device) to force an un-registered state if an invite times out.Use TCP for SIP signaling instead of UDP. That will eliminate the timeouts waiting times.
Stage 1.4 .Keep the Registration retry time very shortIn any INVITE the SIP end device, always try the primary even if it is declared as non-registered, and if succeed, re-register. This is the typical way most of the Phone Vendor implement dual registration (Already tested with Polycom)
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•Suggested Devices attributes:- Local SIP devices with Dual
Registrar/Proxy support.- Extended functionality on local
Gateway(s):• Be the Local Call Control for • WAN Access Router• VRRP• Registrar Server• Local PSTN connection
A Quick Guide for Dual Registrar Approach
Survivability
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•Go beyond Hardware Certification Program- AutoDiscovery- AutoProvisioning
•Consider Survivability as a solution attribute design.
- Add a remote Location entity- Associate SIP End devices belonging to remotes- Define Survival Mode rules- Push Survival Attributes to the local Call Control
Device (Gateway/Router)
A Proposal to Elastix Community
Survivability
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Question and Answers
SmartNode VoIP Gateway
April 10, 2023
PRODUCT PRESENTATION
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Corporate Overview
SmartNode VoIP Gateway
Over 1,000 products…• Patton Designed• Patton Manufactured• Patton Supported• Patton Certified
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Corporate Overview
SmartNode VoIP Gateway
Patton Engineered
Made in the USA
Unrivaled Customer Support
Global Range, Local Reach
A Family Company
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Global Range, Local Reach
• Washington DC, USA – Patton Electronics- Headquarters- Manufacturing plant
• Berne, Switzerland – Patton-Inalp Networks- VoIP competency center- Sales & Marketing Western Europe
• Chennai, India – Patton India- Sales & Marketing India- R&D Center
• Additional offices- Italy, Hungary, Vietnam, Lebanon, Mexico and Sydney
Corporate Overview
SmartNode VoIP Gateway
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SmartNode VoIP Gateway
Past: All TDM
Future: All IP
In the meantime….
SmartNodePoint of Service between TDM and IP
› TDM: Circuit-switched, using ISDN or analog lines› IP: Packet-based, using Internet Telephony technology
Applications
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SmartNode Jobs
Call Switching
Protocols conversion
Voice encoding and decoding
IP Routing
Smar
tNod
e
Circuit Switch
VoIP
G
atew
ay
IP RouterData/Voice
Voice
SmartNode VoIP Gateway
Applications
VoIP
PSTN
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Terminal Gateway SIP Trunk Gateway
SmartNode VoIP Gateway
WAN / VoIP
PSTN / PBX
LAN / VoIP
IP PBX
IP Phones
ISDN Phones
FAX
Applications: IP PBX
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•Terminal Gateway- Connects any analog device to the LAN
• Phone, fax, modem, door or elevator communication system, etc.
Applications: IP PBX
SmartNode VoIP Gateway
LAN / VoIP
IP PBX
ISDN Phones
FAX IP Phones
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•SIP Trunk Gateway to PSTN- Connects IP telephony to PSTN- Survivability
• Life Line (in case of power failure)• SIP Registrar (in case of server failure)
Applications: IP PBX
SmartNode VoIP Gateway
PSTN
LAN / VoIP
ISDN Phone
Life LineFallback
Registrar
IP PBX
IP Phones
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•SIP Trunk Gateway to VoIP/PSTN- Enterprise Session Border Router
• VoIP to VoIP connection, including transcoding- PSTN Fallback if network goes down- QoS for voice priority
Applications: IP PBX
SmartNode VoIP Gateway
WAN / VoIP
PSTN
LAN / VoIP
PSTN FallbackIP PBX
IP Phones
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•SIP Trunking with Traditional PBX- Cut costs with VoIP- Preserve investments in existing infrastructure- PSTN Fallback
Applications: SIP Trunking
SmartNode VoIP Gateway
ITSP
SIPT1
FXSWAN / VoIP
ISDN Phones
PBX
PSTNPSTN Fallback
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•SIP Trunking with all IP- QoS- Security- Transcoding
Applications: SIP Trunking
SmartNode VoIP Gateway
IP PBX ITSP
WAN / VoIP
IP PhonesFAX
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•SIP Trunking with IP AND traditional telephony- Smooth migration from old to new- Staged investments
Applications: SIP Trunking
SmartNode VoIP Gateway
WAN / VoIP
PBX
IP PBX
ITSP
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IP PBX Partners
SmartNode VoIP Gateway
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Softswitch Partners
SmartNode VoIP Gateway
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VoIP Provider Partners
SmartNode VoIP Gateway
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• More than just talk- Patton Quality & Reliability - Proven Interoperability - Robust Enterprise Feature Sets and Functionality- Industry-Best Customer Support - Swiss Designed. Made in the USA.
Why SmartNode?
SmartNode VoIP Gateway
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WAN Uplink
Telephony:ISDN BRI (S0), PRI, FXS, FXO
LAN/WAN Ethernet
Port Layout
SmartNode VoIP Gateway
Power
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• Same firmware for all models- Easy to manage- High interoperability- Learn one, know them all
• Release cycle- Free upgrades every two months - Free updates every 18-months
• Swiss precision engineered
SmartWare Software
SmartNode VoIP Gateway
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Full VoIP Protocol Support SIPv2 T.38 Fax, Fax and Modem Bypass, G.711, G.729, G.726, G.727, G.723 DTMF relay, transparent ISDN data
Telephony Features Euro-ISDN-DSS1, NTT and Q.SIG AOC CLIP/CLIR Hold, Transfer and much more
Outstanding Interoperability Advanced Call Routing Regular Expression Routing Numbering Plan Integration Interoperable for Voice and T.38 fax
Complete Access Routing IP Router, RIP Firewall - NAPT, ACL DHCP, PPPoE IPSec VPN
Quality of Service Voice Priority Traffic Management DownStreamQoS™ TOS, DiffServ, 802.1p
Management & Provisioning Web and CLI managed Auto-Provisioning Configuration Up- and Download Remote upgrades, SNMP
SmartNode Software Features
SmartNode VoIP Gateway
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•Voice and Data Survivability- PSTN Fallback- Failover Relay- SIP Registrar- Dial Backup- IP-Link Redundancy
Survivability
SmartNode VoIP Gateway
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•Voice and Data Survivability- PSTN Fallback
• SmartNode automatically reroutes to the PSTN in the case of a network outage.
- Failover Relay- SIP Registrar- Dial Backup- IP-Link Redundancy
Survivability
SmartNode VoIP Gateway
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•Voice and Data Survivability- PSTN Fallback- Failover Relay
• SmartNode automatically reroutes to the PSTN in the case of a power outage.
- SIP Registrar- Dial Backup- IP-Link Redundancy
Survivability
SmartNode VoIP Gateway
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•Voice and Data Survivability- PSTN Fallback- Failover Relay- SIP Registrar
• SIP clients can register directly with the SmartNode instead of a SIP softswitch. This enables the registered SIP clients to be able to make and receive calls over the PSTN during a network outage.
- Dial Backup- IP-Link Redundancy
Survivability
SmartNode VoIP Gateway
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•Voice and Data Survivability- PSTN Fallback- Failover Relay- SIP Registrar- Dial Backup
• During network and power outages, SmartNode enables dial-up connection to the PSTN for data transfers.
- IP-Link Redundancy
Survivability
SmartNode VoIP Gateway
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•Voice and Data Survivability- PSTN Fallback- Failover Relay- SIP Registrar- Dial Backup- IP-Link Redundancy
• Many SmartNode models ensure connectivity to the network by offering multiple Ethernet ports for WAN link redundancy.
Survivability
SmartNode VoIP Gateway
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•Ensures voice quality by managing data communications so that voice packets and other real-time data are prioritized.
- Priority- Weighted Fair Queuing (WFQ)- Shaping- Burst-Tolerant Shaping
QoS
SmartNode VoIP Gateway
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•DownStreamQoS™- When data floods your downstream line because of
large file downloads, SmartNode creates a virtual bottleneck for data traffic to ensure time-sensitive voice traffic gets through properly.
QoS
SmartNode VoIP Gateway
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•The Problem- VoIP technologies were designed for voice
communications, not fax. Fax requires an uninterrupted data flow to operate.
•SmartNode Solution- G.711 bypass- T.38 Faxing- Fax Transcoding- Interoperability- High-Precision Clock
Fax that Works
SmartNode VoIP Gateway
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Gateway
Gateway-Router IAD ESBR
VoIP Gateway:Converts PSTN to SIP(or H.323) PSTN Interfaces: FXS, FXO, BRI, PRI
Yes Yes YesSN4960 Only
IP RouterIP Routing, QoS, VPN, etc.
No Yes Yes Yes
WAN Access:G.SHDSL, ADSL, X.21, V.35
No No Yes Optional
VoIP Border Controller:Interconnects multiple VoIP networks No No No Yes
Ethernet Ports 1 2+ 1+ 2+
SmartNode Product Categories
SmartNode VoIP Gateway
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SmartNode Product Categories
SmartNode VoIP Gateway
Gateway Gateway-Router IAD
WAN
LAN
LAN
PBX/Phones
WAN
Modem
Modem
LAN
PBX/Phones
WAN
PBX/Phones
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M-ATA SN4110
SN4520
SN4830
SN4300
SN4400*
SN4900
Telephony Interfaces
FXSFXS & FXO
FXS & FXO
FXS & FXO
FXS FXSFXS or FXO
# of Telephony Ports
12, 4, 6, or
82, 4, 6, or
82, 4, 6, or
816, 24, or
3212, 16, 24,
or 3212, 16, 24,
or 32
VoIP Gateway:Converts PSTN to SIP(or H.323) PSTN Interfaces: FXS, FXO, BRI, PRI
Yes Yes Yes Yes Yes Yes Yes
IP RouterIP Routing, QoS, VPN, etc.
No No Yes Yes No Yes Yes
Number of Ethernet Ports
1 1 2 2 1 2 2
WAN Access No No No
G.SHDSLSerial X.21Serial V.35
NoNo
(Optional)Serial X.21Serial V.35
*The SN4400 only differs from the SN4900 in that it has FXS interfaces only, no WAN access, a single internal power supply, and 0° to 40° C operating temperature (instead of 0 ° to 50° C)
Analog FXS/FXO Product Line
SmartNode VoIP Gateway
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SN-DTA
SN4120
SN4630
SN4650
SN4660
SN4670
Telephony Interfaces BRI (NT or NT+TE)
BRI (TE) BRI BRIBRI with FXS/FXO
BRI with FXS/FXO
# of Telephony Ports 1 or 2 1 or 2 3 or 5 3 or 5 Up to 12 Up to 12
# of VoIP Calls 2 or 4 2 or 4 4 or 8 4 or 8 Up to 36 Up to 36
VoIP Gateway:Converts PSTN to SIP(or H.323) PSTN Interfaces: FXS, FXO, BRI, PRI
Yes Yes Yes Yes Yes Yes
IP RouterIP Routing, QoS, VPN, etc.
No No Yes Yes Yes Yes
Number of Ethernet Ports
1 1 2 1 4 4
WAN Access No No NoG.SHDSL
Serial X.21Serial V.35
No G.SHDSL
ISDN BRI Product Line
SmartNode VoIP Gateway
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SN4940 SN4950 SN4960
Telephony Interfaces T1/E1/PRI T1/E1/PRI T1/E1/PRI
# of Telephony Ports 1 or 4 1 or 4 1 or 4
# of VoIP Calls Up to 120 Up to 120 Up to 120
VoIP Gateway:Converts PSTN to SIP(or H.323) PSTN Interfaces: FXS, FXO, BRI, PRI
Yes Yes Yes
IP RouterIP Routing, QoS, VPN, etc.
No Yes Yes
Number of Ethernet Ports 1 2 2
WAN Access No(Optional)G.SHDSL
G.SHDSLSerial X.21Serial V.35
VoIP Border Controller:Interconnect multiple VoIP networks
No No Yes
T1/E1/PRI Product Line
SmartNode VoIP Gateway
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SN5200 SN5400 SN4960
Telephony Interfaces None NoneT1/E1/PRI(1 or 4)
SIP to SIP Call Capacity Up to 32 Up to 196 Up to 180
SIP to SIP Call Capacity With Transcoding
N/A Up to 64 Up to 60
VoIP Gateway:Converts PSTN to SIP(or H.323) PSTN Interfaces: FXS, FXO, BRI, PRI
No No Yes
IP RouterIP Routing, QoS, VPN, etc.
Yes Yes Yes
Number of Ethernet Ports 5 2 2
WAN Access No G.SHDSLG.SHDSL
Serial X.21Serial V.35
VoIP Border Controller:Interconnect multiple VoIP networks
Yes Yes Yes
Enterprise Session Border Routers (ESBR) Product Line
SmartNode VoIP Gateway
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• The BEST support team in the business!- Free Lifetime Support and Upgrades- 24/7 Premium Support- SmartNode Training- On-Line Help
Industry-Best Customer Support
SmartNode VoIP Gateway
“Your support team was fantastic. The best support call I have ever had to make. You guys are by far the best (and I have called everyone) in the business. I can't thank you enough for the great service.”
- Joe Santaniello- IT Manager at Wireless Zone
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SmartNode VoIP Gateway
For more information on
SmartNode, please visit:
www.patton.com/smartnode
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Question and Answers
e: [email protected]: +41 (31) 985 25 25f: +41 (31) 985 25 26
SmartNode VoIP Gateway