9.2.14 SDP Capability Negotiation (SDPCapNeg)

29.1633GPPInterworking between the IP Multimedia (IM) Core Network (CN) subsystem and Circuit Switched (CS) networksTS

The SDP Capability Negotiation (SDPCapNeg) as specified in IETF RFC 5939 [150] is adopted as an optional functionality to negotiate capabilities and their associated configurations according to 3GPP TS 24.229 [9].

The requirements and procedures as described in subclause 5.2.3 of 3GPP TS 23.333 [151] for MRFC and MRFP, apply to the MGCF and the IM-MGW when SDPCapNeg is used.