ETSI EN 300 443-4-2001 宽带综合业务数字网(B-ISDN).2号数字用户信令系统(DSS2)协议.用于基本呼叫/承载控制的B-ISDN用户-网络接口第3层规范.第4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
Broadband Integrated Services Digital Network (B-ISDN); Digital Subscriber Signalling System No. Two (DSS2) Protocol; B-ISDN User-Network Interface Layer 3 Specification for Basic Call/Bearer Control; Part 4: Abstract Test Suite (ATS) and Partial Protocol