ETSI I-ETS 300 317 PRA1-1996 修改件prA1.综合业务数字网(ISDN).1号数字用户信令系统(DSS1).用于电路模式基本呼叫控制(基本接入,用户)的信令网络层协议实现一致性声明(PICS)的形式规范
AMD prA1 Integrated Services Digital Network (ISDN); Digital Subscriber Signalling System No. One (DSS1); Protocol Implementation Conformance Statement (PICS) Proforma Specification for Signalling Network Layer Protocol for Circuit-Mode Basic Call Control