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SIP-I¶
SIP-I is a SIP based ISUP replacement specified by ITU-T.
It has been adopted by 3GPP as a Release 8 (or later) protocol on the Nc interface (signaling between MSCs/G-MSCs) in TS 23.231
It is not supportedin OsmoMSC or osmo-sip-connector. This is just for reference.
Spec References¶
- ITU-T Q.1912.5: Interworking between session initiation protocol (SIP) and BICC or ISUP
- 3GPP TR 29.802: (G)MSC-S – (G)MSC-S Nc Interface based on the SIP-I protocol; (abandoned after Rel7?)
- 3GPP TS 23.231: SIP-I based circuit-switched core network; Stage 2
- a lot of focus on MGW selection (deferred, optimized, bypass)
- describes interaction with supplementary services
- 3GPP TS 29.235: Interworking between SIP-I based circuit-switched core network and other networks
- 3GPP TS 29.163: Interworking between the IP Multimedia (IM) Core Network (CN) subsystem and Circuit Switched (CS) networks
- 3GPP TS 29.164: Interworking between the 3GPP CS domain with BICC or ISUP as signalling protocol and external SIP-I networks
- GSMA IR.83: SIP-I Interworking Description
Updated by laforge about 2 years ago · 2 revisions