ETSI TS 128 062-2001 数字蜂窝通信系统(第2+阶段).全球移动通信系统(UMTS).语音编解码器的带内先后自由操作(TFO).业务描述.第3阶段3GPP TS 28.062(版本4.1.1,第4次发布)
Digital Cellular Telecommunications System (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); Inband Tandem Free Operation (TFO) of Speech Codecs; Service Description; Stage 3 3GPP TS 28.062 Version 4.1.1 Release 4