Universal Mobile Telecommunications System (UMTS); LTE; IMS Multimedia telephony communication service and supplementary services; Stage 3 (V11.3.0; 3GPP TS 24.173 version 11.3.0 Release 11)
The present document provides the protocol details for multimedia telephony communication service and associated supplementary services in the IP Multimedia (IM) Core Network (CN) subsystem based on the requirements from 3GPP TS 22.173 [2]. Multimedia telephony and supplementary services allow users to establish communications between them and enrich that by enabling supplementary services.