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 produced specifications for a family of protocols that provide reliable datagram service and user layer adaptations for SS7 and ISDN communications protocols. SIGTRAN is logically 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.
TelcoBridges and SIGTRAN
TelcoBridges provides support for SIGTRAN starting in 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 | 20 | 60 |
| TMG3200 | 64 | 64 in&out | 64 | 64 | 20 | 60 |
| TMG7800 | 1024 (64/Tmedia) |
64 in&out | 512 (64/Tmedia) |
1024 (64/Tmedia) |
20 | 60 |
Standard references:
- SCTP
- SCTP, IETF (Internet Draft, Jan 17, 2000)
- SCTP, (RFC 2960), October 2000
- M3UA
- RFC 2719, IETF, M3UA
- RFC 3332, IETF
- M3UA, Implementation Guide, IETF, 2002
- M2UA
- SS7 MTP2-User Adaptation Layer, RFC 3331, IETF
- M2PA
- draft-ietf-sigtran-m2pa-13: SS7 MTP2 User Peer-to-Peer Adaptation Layer (M2PA)
- RFC 4165
- IUA
- IETF RFC 4233 ISDN Q.921 User Adaptation Layer 01/2006
- IETF draft-ietf-sigtranrfc4233update-01 IUA (RFC 4233) TEI Query Request Number 07/2007
- ETSI TS 102 332 V1.1.1 ISDN Q.921 User Adaptation Layer
Configuration
- Web Portal v2.8: SIGTRAN Configuration
- Web Portal v2.7: SIGTRAN Configuration
- Web Portal v2.6: SIGTRAN Configuration
- Web Portal v2.5: SIGTRAN Application Scenarios
- Web Portal v2.4: SIGTRAN Application Scenarios