SIGTRAN
SIGTRAN refers to the ability to provide SS7 and ISDN signaling over an IP network.
SIGTRAN is the name given to an Internet Engineering Task Force (IETF) working group that produces specifications for a family of protocols that provide reliable datagram service and user layer adaptations for SS7 and ISDN communications protocols. SIGTRAN is an extension of the SS7 protocol family. It supports the same application and call management paradigms as SS7 but uses an IP transport called Stream Control Transmission Protocol (SCTP) as its underlying transport vehicle. Indeed, the most significant protocol defined by the SIGTRAN group was SCTP, which is used to carry PSTN signaling over IP.
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TelcoBridges and SIGTRAN
TelcoBridges provides support for SIGTRAN starting from Toolpack v2.4. TelcoBridges' SIGTRAN implementation provides support for SCTP, M2UA, M2PA, M3UA and IUA. (SUA support is not currently planned as part of the initial SIGTRAN release.)
Among the features of TelcoBridges' SIGTRAN implementation are the following:
- M2PA with 64 links (termination)
- M2UA in SG and ASP mode (relay)
- M3UA in SG, ASP and IPSP mode (relay)
- M3UA with load distribution features similar to the MTP3 stack (termination)
Maximum Capacity
| Model | SCTP links | SCTP streams/links | M2PA links | M2UA links | M3UA links | M3UA routing context |
|---|---|---|---|---|---|---|
| TMG800 | 64 | 64 in&out | 64 | 64 | 64 | 60 |
| TMG3200 | 64 | 64 in&out | 64 | 64 | 64 | 60 |
| TMG7800 | 1024 (64/Tmedia) |
64 in&out | 512 (64/Tmedia) |
1024 (64/Tmedia) |
64 | 60 |
Standard references:
- SCTP
- RFC 4960, September 2007
- M3UA
- RFC 4666, IETF
- M3UA, Implementation Guide, IETF, 2002
- M2UA
- SS7 MTP2-User Adaptation Layer, RFC 3331, IETF
- M2PA
- RFC 4165, IETF
- IUA
- IETF RFC 5133 ISDN Q.921 User Adaptation Layer, December 2007
- ETSI TS 102 332 V1.1.1 ISDN Q.921 User Adaptation Layer
Configuration
- Web Portal v3.0: SIGTRAN Configuration
- Web Portal v2.10: SIGTRAN Configuration
- Web Portal v2.9: SIGTRAN Configuration
- Web Portal v2.8: SIGTRAN Configuration
- Web Portal v2.7: SIGTRAN Configuration
