Summary

Recommendation ITU-T J.366.4 defines a call control protocol for use in the IP multimedia (IM) core network (CN) subsystem based on the session initiation protocol (SIP), and the associated session description protocol (SDP).

The Third Generation Partnership Project (3GPP) has developed the specification in a form optimized for the wireless environment. This Recommendation references the ETSI version of the 3GPP specification (ETSI TS 124 229 V6.9.0 (2005-12)) and specifies only the modifications necessary to optimize it for the cable environment.