Summary

Recommendation ITU-T J.366.3 defines the stage-2 service description for the IP Multimedia Core Network Subsystem (IMS), which includes the elements necessary to support IP multimedia (IM) services. Recommendation ITU‑T I.130 describes a three-stage method for the characterization of telecommunication services, and Recommendation ITU‑T Q.65 defines Stage 2 of the method.

The Third Generation Partnership Project (3GPP) has developed the specification in a form optimized for the wireless environment. Recommendation ITU-T J.366.3 references the ETSI version of the 3GPP specification (ETSI TS 123 228 V6.12.0 (2005-12)) and specifies only the modifications necessary to optimize it for the cable environment.