Search for a 3GPP Specification (number and/or title):  

Download results in JSON format

Spec	Title	Releases	WG
24.642	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	18.0.0 17.0.0 16.0.0 15.0.0 14.0.0 13.0.0 12.0.0 11.4.0 10.7.0 9.10.0 8.11.0	C1

All information on this page is aggregated from the 3GPP Specfication Status Report page.