ETSI EN 300 196-1-2001 综合业务数字网(ISDN).用于支持补充业务的通用功能协议.1号数字用户信令系统(DSS1)协议.第1部分:协议规范(版本1.3.2)
Integrated Services Digital Network (ISDN); Generic Functional Protocol for the Support of Supplementary Services; Digital Subscriber Signalling System No. One (DSS1) Protocol; Part 1: Protocol Specification (V1.3.2)