DIN ETS 300665-1:1997 宽带综合业务数字网(B-ISDN).数字用户用2号信令系统(DSS2)协议.被叫连接线识别表示补充业务.第1部分:协议规范
Broadband Integrated Services Digital Network (B-ISDN) - Digital Subscriber Signalling System No. two (DSS2) protocol; Connected Line Identification Presentation (COLP) supplementary service - Part 1: Protocol specification [ITU-T Recommendation Q.2951, c