ETSI TS 123 091-2010 数字蜂窝通信系统(第2+阶段).全球移动通信系统(UMTS).显式呼叫转移(ECT)补充业务.第2阶段(版本9.0.0).3GPP TS 23.091(版本9.0.0,第9次发布).包括磁盘
Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); Explicit Call Transfer (ECT) supplementary service; Stage 2 V9.0.0; 3GPP TS 23.091 version 9.0.0 Release 9; Includes Diskette