ETSI TS 126 235-2004 数字蜂窝通信系统(第2+阶段).全球移动通信系统(UMTS).分组交换会话多媒体应用.默认编解码器.3GPP TS 26.235(版本6.3.0,第6次发布)
Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); Packet switched conversational multimedia applications; Default codecs 3GPP TS 26.235 Version 6.3.0 Release 6