ITU-T - Q.3625
Completion of communications to busy subscriber and completion of communications by no reply using IP multimedia core network subsystem – Protocol specification
|Publication Date:||1 February 2016|
This Recommendation specifies the requirements to protocols implementation for providing supplementary services such as completion of communications to busy subscriber (CCBS) and completion of communications by no reply (CCNR) on the IMS basis.
The Recommendation endorses ETSI TS 124 642 V10.7.0 (2013-07), "Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); LTE; Completion of Communications to Busy Subscriber (CCBS) and Completion of Communications by No Reply (CCNR) using IP Multimedia (IM) Core Network (CN) subsystem; Protocol specification (3GPP TS 24.642 version 10.7.0 Release 10)".