SIGTRAN

Revision as of 13:13, 19 September 2014

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 values:

• SCTP max number of association = 64 per adapter
• SCTP max number of streams per association = 64 (in) and 64 (out)
• IPv6 = Not yet. Refer to roadmap for IPv6 support
• M2PA max links = 64 (controlled via licensing)
• M2UA max links = 64 (controlled via licensing)
• M3UA max PSP = 20 (controlled via licensing)
• M3UA PS = 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

Related actions

Refer to the appropriate release of Toolpack:

• Web Portal v2.7: SIGTRAN Configuration
• Web Portal v2.6: SIGTRAN Configuration
• Toolpack v2.5: SIGTRAN Application Scenarios
• Toolpack v2.4: SIGTRAN Application Scenarios

References

• Wikipedia article
• Introduction to SIGTRAN, by Jim Darroch
• Pricing model (TelcoBridges)