Extending the Life of your SS7 Network with SIGTRAN
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The document discusses the importance and ongoing evolution of SS7 networks, emphasizing the need for migration to IP-based solutions due to aging equipment and vendor support issues. It outlines various strategies for extending SS7 network life, including enabling SIGTRAN for existing STPs and replacing outdated hardware. Additionally, it highlights the benefits of bridging old and new technologies to improve network reliability and service delivery.
Extending the Life of your SS7 Network with SIGTRAN
- 1. Extending the Life of SS7 Networks 1 with SIGTRAN and STPs
- 2. 2 Today’s Presenters: Confidential Alan D Percy Senior Director of Product Marketing alan.percy@telcobridges.com Marc St-Onge Director of Sales Support marc.stonge@telcobridges.com
- 3. 3 SS7 is very much alive! • It is the core of the global PSTN • It ensures global voice & SMS connectivity • And it is growing at 3 to 4% per year SMS traffic is increasing More roaming Increasing number of MVNOs Local number portability, 1-800 numbers
- 4. 4 But its evolution is a challenge! • Aging STP equipment • Built on proprietary hardware • Vendors announcing end-of-life and end of support • Legacy STPs do not support IP • Carriers are denied the benefit of modern networks • A forklift upgrade is not desirable • Need an evolution path to bridge old and new • Difficult to connect existing infrastructures to new networks
- 5. SS7 Network Architecture 5 SSP C STP 1 STP 2 SCP A STP 3 STP 4 SCP B SSP A SSP B A A A A C F B D D B C A A A A A A Voice circuit SS7 link SSP = Service Switching Point STP = Signaling Transfer Point SCP = Signaling Control Point
- 6. SS7 Network Architecture 6 SSP C STP 1 STP 2 SCP A STP 3 STP 4 SCP B SSP A SSP B A A A A C F B D D B C A A A A A A Voice circuit SS7 link - Class 5 switch - Class 4 switch - MSC - LNP database - 1-800 database - CNAM database - HLR, VLR, SMSC
- 7. SS7 Protocol Stacks 7 MTP Level 1 MTP Level 2 MTP Level 3 ISUP Ethernet IP Physical Data link Network Application Presentation Session Transport SCTP M2PA SCCP TCAP MAP, CAP, INAP SIGTRAN SS7 MTP Level 3 ISUP SCCP TCAP MAP, CAP, INAP Ethernet IP SCTP M3UA ISUP SCCP TCAP MAP, CAP, INAP
- 8. SIGTRAN standards • Defined by the IETF • SCTP (Stream Control Transmission Protocol) • RFC 4960 • Message oriented, reliable, in-sequence delivery • Supports multi-homing for redundancy • M2PA (MTP2 User Peer-to-Peer Adaptation Layer) • RFC 4165 • Equivalent to SS7 TDM links, but over IP • M3UA (MTP3 User Adaptation Layer) • RFC 4666 • Enables the transport of higher-layer protocols over IP 8
- 9. 9 Extend the Life of your SS7 Network 1. Migrate SS7 TDM links to IP 2. Keep your STPs, enable them for SIGTRAN 3. Replace your STPs 4. Bridge old and new networks 5. Migrate any SS7 link to IP Confidential
- 10. 10 Extend the Life of your SS7 Network 1. Migrate SS7 TDM links to IP Confidential
- 11. 1. SS7 link migration 11 Off Net Leased line On Net Transmission network STP STP SS7 Switch SS7 link on TDM (56/64 kbps on T1/E1) SS7 link on TDM (56/64 kbps on T1/E1)
- 12. 1. SS7 link migration 12 - Eliminates recurring cost of leased line - 100% transparent for the switch - Higher reliability due to IP network IP network On Net Transmission network STP STP SS7 Switch M3UA MTP2 SGW
- 13. 13 Extend the Life of your SS7 Network 2. Keep your STPs, enable them for SIGTRAN Confidential
- 14. 2. Enable SIGTRAN for your STPs 14 STP STP SS7 Switch Switch Switch STP STP SS7 A-links on TDM B and D-links on TDM STPs do not support SIGTRAN
- 15. 2. Enable SIGTRAN for your STPs 15 STP STP SS7 Switch Switch Switch STP STP B and D-links using M3UA IP - Transparent to existing STPs and switches - Opens the network to new SS7 options - Maintains current STPs in place SGW SGW
- 16. 16 Extend the Life of your SS7 Network 3. Replace your STPs Confidential
- 17. 3. Replace end-of-life STPs 17 STP STP SS7 Switch Switch Switch STP STP These STPs are no longer supported
- 18. 3. Replace end-of-life STPs 18 SS7 Switch Switch Switch STP STP IP B and D-links using M2PA A-links on TDM - Provides a supported STP solution - Enables the use of SIGTRAN protocols - Transparent to voice switches - Opens the network to new SS7 providers STP STP
- 19. 19 Extend the Life of your SS7 Network 4. Bridge old and new networks Confidential
- 20. 4. Bridge old and new networks 20 STP STP SS7 Switch Switch Switch STP STP Replace these STPs with virtual STPs
- 21. 4. Bridge old and new networks 21 SS7 Switch Switch Switch STP STP IP Virtual STP Virtual STP A-links on TDM M2PA M3UA SGW SGW
- 22. 4. Bridge old and new networks 22 SS7 Switch Switch Switch STP STP IP Virtual STP Virtual STP HLR SMSC MSC IMS/ LTE - Connects old and new - Transparent to existing SS7 nodes - Provides agility to deliver new services SGW SGW
- 23. 23 Extend the Life of your SS7 Network 5. Migrate any SS7 link to IP Confidential
- 24. 5. Migrate any link to IP 24 SS7 node SS7 node MUX MUX Leased line SS7 on TDM using MTP2
- 25. 5. Migrate any link to IP 25 SS7 node SS7 node M2UA IP MTP2 MTP2 - Eliminates expensive leased lines - Improves network redundancy - Transparent to existing SS7 nodes - Highly reliable Survives up to: - 5% packet loss - 7.5 s round trip delay SGW SGW
- 26. 26 Intro: Tsig TSG800 Signaling gateway/STP • Up to 16 x T1/E1 for SS7 on TDM • 6 x GigE ports for SIGTRAN, management, SNMP • Redundant power supplies (DC or AC) Low-speed Links High-speed links SIGTRAN associations MTP3 routes SCCP/ GTT MSU/s 64 2 64 512 384 5,000
- 27. 27 Q/A & Next Steps: • More on SS7 at: • https://docs.telcobridges.com/tbwiki/SS7 • Information on TSG800 at: • https://www.telcobridges.com/products/ tsig-signaling-gateways/tsg800 • Request a consultation at: • https://www2.telcobridges.com/SS7Consult Copyright 2019
- 28. THANK YOU! www.telcobridges.com sales@telcobridges.com HQ: +1.450.655.8993 HK: +852.3749.9819 28 Confidential