ETSI ETS 300 324-1 PRA1-1995 修改件 prA1. 信令协议与交换(SPS).数字本地交换(LE)的V接口.支持接入网(AN)的V5.1接口.第1部分:V5.1接口规范
AMD prA1 Signalling Protocols and Switching (SPS); V Interfaces at the Digital Local Exchange (LE); V5.1 Interface for the Support of Access Network (AN); Part 1: V5.1 Interface Specification