ETSI EN 301 490-2-2000 专用综合业务网(PISN).内部交换信令协议.用于VPN“b”业务接入点的呼叫转移补充业务.第2部分:抽象测试套件(ATS)和部分协议额外测试信息实现(PIXIT)形式规范
Private Integrated Services Network (PISN); Inter-Exchange Signalling Protocol; Call Transfer Supplementary Service for the VPN "b" Service Entry Point; Part 2: Abstract Test Suite (ATS) and Partial Protocol Implementation eXtra Information for Testing (P