Integrated Services Digital Network (ISDN) - Layer 3 Signaling Specification for Circuit Switced Bearer Service for Digital Subscriber Signaling System Number 1(DSS1)
综合业务数字网(ISDN).第1号数字用户信令系统(DSS1)电路交换承载业务的第3层信令规范
This standard specifies the procedures for the establishing, maintaining, and clearing of network connection at the Integrated Services Digital Network (ISDN) user-network interface for the support of circuit switched calls. These procedures are defined in terms of messages exchange over the D-channel.