ETSI TS 123 172-2005 全球移动通信系统(UMTS).电路交换(CS)多媒体业务的技术实现.UDI/RDI退却和业务修正.第2阶段.3GPP TS 23.172(版本5.6.0,第5次发布).包括磁盘
Universal Mobile Telecommunications System (UMTS); Technical realization of Circuit Switched (CS) multimedia service; UDI/RDI fallback and service modification; Stage 2 3GPP TS 23.172 Version 5.6.0 Release 5; Includes Diskette