ETSI TS 129 228-2005 数字蜂窝通信系统(第2+阶段).全球移动通信系统(UMTS).IP多媒体(IM)子系统Cx和Dx接口.信令流和消息内容.3GPP TS 29.228(版本6.8.0,第6次发布).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 3GPP TS 29.228 Version 6.8.0 Release 6; Includes Diskette