ETSI PRETS 300 347-1 PRA1-1997 信令协议与交换(SPS).数字本地交换(LE)的V接口.支持接入网络(AN)的(版本5.2)接口.第1部分:V5.2接口规范
Signalling Protocols and Switching (SPS); V Interfaces at the Digital Local Exchange (LE); V5.2 Interface for Support of Access Network (AN); Part 1: V5.2 Interface Specification