ETSI TS 124 403-2009 数字蜂窝通信系统(第2+阶段).全球移动通信系统(UMTS).TISPAN.基于会话初始协议(SIP)和会话描述协议(SDP)的IP多媒体呼叫控制协议第3阶段[3GPP TS 24.22
Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); TISPAN; IP Multimedia Call Control Protocol based on Session Initiation Protocol (SIP) and Session Description Protocol (SDP) Stage 3 [3GPP TS 24.229