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SS7 - MTP3 Technical Training from TelcoBridges
- 1. SS7 – MTP3 Your Bridge to the Cloud
- 2. Topics Covered in this Presentation ▪ SS7 MTP3 Overview ▪ MTP3 support on TelcoBridges products ▪ MTP3 configuration ▪ MTP3 Status • Troubleshooting
- 3. 3 SS7 MTP3 Overview ▪ MTP3 Protocol ▪ Used to route ISUP (Call Control) and SCCP (Data) messages on the SS7 network ▪ Routes messages using Point Codes ▪ Distributes messages on multiple links for redundancy and performance ▪ Works on TDM with MTP2 ▪ Works on IP with M2PA or M2UA
- 4. 4 MTP3 Overview ▪ Signaling Switching Point (SSP) mode ▪ Used to terminate ISUP/SCCP signaling M2PA ISUP MTP3 SCTP/IP MTP2 TDM Point Codes IP/Port T1/E1 timeslot SCCP SS7 signaling over 64kbps TDM links or High Speed Links (HSL) SS7 signaling over IP links TCAP Layer 3
- 5. 5 MTP3 Overview ▪ Signaling Transfer Point (STP) mode ▪ Used to relay ISUP/SCCP signaling M2PA MTP3 SCTP/IP MTP2 TDM Point Codes IP/Port STP T1/E1 timeslot Layer 3 SS7 signaling over 64kbps TDM links or High Speed Links (HSL) SS7 signaling over IP links
- 6. 6 MTP3 Overview ▪ Main Link types ▪ A links: SSP to STP ▪ C links: STP to STP ▪ F links: SSP to SSP SSP STP SSP STP A link C link F link
- 7. 7 MTP3 Overview ▪ Point Codes ▪ Each signaling element has a Point Code ▪ Originating Point Code (OPC) ▪ Destination Point Code (DPC) ▪ Point Code format ▪ ANSI 8.8.8 (8 bits, 8 bits, 8 bits), up to 255.255.255 ▪ ITU 3.8.3 (3 bits, 8 bits, 3 bits), up to 7.255.7 ▪ Can also be decimal or hexadecimal values
- 8. 8 MTP3 Linksets MTP2 links STP STP SSP MTP3 linkset Load Sharing OPC DPC DPC SS7 Network SLC=0 SLC=1 SLC=14 SLC=15 ▪ Linksets combine multiple links ▪ Each have an identifier (SLC) ▪ Messages will be distributed between the links MTP3
- 9. SSP 9 MTP3 Linksets STP MTP3 Uses other link in case of failure Links utilization should be 40% to 50% at peak traffic All MTP3 Packets are acknowledged and ordered ▪ MTP3 will use active links for sending messages ▪ Will retransmit if necessary MTP3 linkset
- 10. SSP 10 MTP3 Linksets MTP3 SLTA: Same Information returned ▪ Signaling Link Test Message (SLTM) ▪ Signaling Link Test Acknowledgement (SLTA) ▪ Sent on each link of a linkset SLTM: Network Indicator Point Codes: OPC/DPC pair SLC: Link identifier SSP MTP3
- 11. 11 MTP3 Routes STP STP SSP SSP MTP3 Linkset priority in a route DPC DPC DPC Destination Point Code SS7 Network Local route Route to each destination SSP Route to each STP ▪ MTP3 Routes identify all possible destinations ▪ Point Codes are static OPC Originating Point Code
- 12. 12 MTP3 Routes ▪ Main Management messages ▪ Traffic Prohibited (TFP) ▪ Traffic Restart Allowed (TRA) SSP STP Point Code 5.5.5 TFP 5.5.5 Point Code 7.7.7 STP SSP
- 13. 13 MTP3 Support ▪ Supported on all TelcoBridges TMG and TSG units TMG800 TSG800 TMG3200 TSG3200 TMG7800 Termination mode Yes No Yes No Yes STP mode Yes Yes Yes Yes Yes MTP3 linksets 256 256 256 256 512 OPC 64 64 64 64 64 DPC 512 512 512 512 512
- 14. 14 MTP3 Configuration ▪ MTP2 (TDM) ▪ T1/E1, DS3, OC3/STM-1, 56 or 64kbps (or HSL) ▪ M2PA or M2UA (IP) ▪ Local IP, Remote IP, SCTP ports ▪ MTP3 ▪ Variant: ANSI or ITU ▪ Originating Point Codes (OPC) ▪ Destination Point Codes (DPC)
- 15. 15 MTP3 Configuration ▪ MTP3 ▪ Linksets ▪ Groups of up to 16x MTP2 links, M2PA or M2UA links ▪ SLC value for each link ▪ Priority of links in a linkset ▪ Routes ▪ One route to each STP and each SSP (i.e. to each DPC) ▪ One Local route per OPC ▪ Priority of linksets in a route
- 16. Point Codes configuration 16 ▪ Requires: ▪ OPC ▪ PC for each STP (DPC) ▪ PC for target SSP (DPC) ▪ ITU PC: 3.8.3 ▪ ANSI PC: 8.8.8
- 17. SS7 MTP3 configuration 17 ▪ MTP3 Configuration ▪ SP mode (or STP mode) ▪ MTP3 Network ▪ ANSI or ITU ▪ National, international
- 18. SS7 MTP3 configuration 18 ▪ MTP3 Linkset Configuration ▪ One to each STP (A link) ▪ One per direct SSP (F link) ▪ MTP2, M2PA or M2UA links
- 19. SS7 MTP3 configuration 19 ▪ MTP3 Routes Configuration ▪ One route to each STP ▪ One route to target SSP ▪ One local route (OPC)
- 20. 20 Upper layer Configuration • STP → Not needed • SSP → Configure ISUP (or SCCP) • Activate Configuration
- 21. Status 21 • Can see global status of the system MTP3 Status
- 22. 22 MTP3 Status • Can see the status of the MTP3 link and linkset
- 23. 23 MTP3 Status • Additional information about the link…also in MTP2/M2PA status • Can inhibit a MTP3 link • For testing • Cannot inhibit the last link of a MTP3 linkset • Apply states • Will take effect immediately
- 24. 24 MTP3 Status • Linkset state • At least one lower-layer link needs to be available • Can deactivate a MTP3 linkset • For testing
- 25. 25 MTP3 Configuration – Lab Setup For Lab setup: ▪ MTP2 and M2PA link ▪ MTP3 – SSP to SSP ▪ Point codes, linksets, MTP3 routes ▪ TDM line interface ▪ E1 ▪ ISUP ▪ Circuit groups: link with physical timeslots for voice/data
- 26. 26 MTP3 Configuration – Lab Setup Lab setup ISUP MTP3 Call Control M2PA One Circuit Group CIC 3 to 31 Point Code: 7.0.1 One Linkset IP: 192.168.101.181 Port 3565 ISUP MTP3 Call Control E1 One Circuit Group CIC 3 to 31 Point Code: 7.0.2 One Linkset IP: 192.168.101.160 Port 3565 M2PA Local IP network E1 MTP2 MTP2
- 27. 27 MTP3 Configuration – Lab Setup • Global Status from Web portal • See if MTP3 link, linkset and route is up • Show Lab configuration and status
- 28. 28 Troubleshooting tools • MTP3 Signaling Trace • Connect SSH to unit • type “tbsigtrace” • This will create a cap file, viewable with wireshark • Get the file from the unit with sftp: /lib/tb/toolpack/setup/12358/3.2/apps/tbsigtrace
- 29. TBReport ▪ Report ▪ Captures logs for a specified date
- 30. TBReport ▪ Report includes ▪ Application logs for a specified time span ▪ Journal of host ▪ Snapshot of the telecom unit configuration and status ▪ Configuration backup
- 31. Documentation ▪ Installation: https://docs.telcobridges.com/Tmedia_Products_Installation ▪ MTP3 overview: https://docs.telcobridges.com/MTP3 ▪ MTP3 configuration: https://docs.telcobridges.com/Toolpack:Protocol_Stack_Settings_E#tab=SS7_ISUP ▪ Troubleshooting: https://docs.telcobridges.com/Tmedia_Troubleshooting ▪ Support: https://docs.telcobridges.com/Tmedia_Support