Summary

Recommendation ITU-T Q.4009.1 v.1 (2016) specifies the testing requirements for supplementary service "Completion of communications to busy subscriber (CCBS) and completion of communications by no reply (CCNR) using IP multimedia (IM) core network (CN) subsystem; Conformance test specification – Part 1: Protocol implementation conformance statement (PICS)".

The version number, v.1, indicates that this is version one of Recommendation ITU-T Q.4009.1, and that it relates to Release 10 of the relevant 3GPP/ETSI standard.

This Recommendation endorses ETSI TS 101 588-1 V5.1.1 (2012-10); "IMS Network Testing (INT); Completion of Communications to Busy Subscriber (CCBS) and Completion of Communications by No Reply (CCNR) using IP Multimedia (IM) Core Network (CN) subsystem; Conformance Test Specification; Part 1: Protocol Implementation Conformance Statement (PICS)".