GB/T 17154.2-1997
ActiveISDN user-network interface layer 3 specification and testing method for basic call control procedure--Part 2:Testing method for layer 3 basic call control protocol
ISDN用户-网络接口第三层基本呼叫控制技术规范及测试方法 第2部分:第三层基本呼叫控制协议测试方法
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GB/T 17154.1-1997
ISDN user-network interface layer 3 specification and testing method for basic call control--Part 1:Layer 3 specification for basic call control
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