Integrated Services Digital Network (ISDN); Digital Subscriber Signalling System No. one (DSS1) protocol; Basic call control; Enhancement at the b service entry point for Virtual Private Network (VPN) applications; Part 3: Test Suite Structure and Test Purposes (TSS&TP) specification for the user
综合业务数字网(ISDN);数字用户信令系统第一号(DSS1)协议;基本呼叫控制;增强虚拟专用网络(VPN)应用的b服务入口点;第3部分:用户测试套件结构和测试目的(TSS&TP)规范