ETSI TS 129 231-2017 数字蜂窝通信系统(第2+阶段)(GSM全球移动通信系统);通用移动通信系统(UMTS);SIP-I(会话初始协议)应用于电路交换(CS)核心网络架构;第3阶段(V14.0.0;3GPP TS 29.231版本14.0.0 发行版本14)
Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); Application of SIP-I Protocols to Circuit Switched (CS) core network architecture; Stage 3 (V14.0.0; 3GPP TS 29.231 version 14.0.0 Release 14)