ITU-T Q.2933-1996
数字用户信令系统No.2(DSS2)协议.帧中继业务的信令规范.第1部分:协议规范
Digital Subscriber Signalling System No. 2 (DSS 2) - Signalling Specification for Frame Relay Service - Series Q: Switching and Signalling Broadband ISDN - B-ISDN Application Protocols for Access Signalling