ETSI TS 129 228-2008 数字蜂窝通信系统(第2+代);全球移动通信系统(UMTS);IP多媒体(IM)子系统Cx和Dx接口;信号流和信息内容V7.9.0;3GPP TS 29.228 版本7.9.0 发布7;包括磁盘
Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); IP Multimedia (IM) Subsystem Cx and Dx Interfaces; Signalling flows and message contents V7.9.0; 3GPP TS 29.228 version 7.9.0 Release 7; Includes Di