ETSI EN 300 356-5-2001 综合业务数字网(ISDN).7号信令系统(SS7).国际接口的ISDN用户部分(ISUP)版本4.第5部分:被叫线路识别表示(COLP)补充业务(版本4.1.2).ITU-T建议Q.731,
Integrated Services Digital Network (ISDN); Signalling System No.7 (SS7); ISDN User Part (ISUP) Version 4 for the International Interface; Part 5: Connected Line Identification Presentation (COLP) Supplementary Service (V4.1.2; ITU-T Recommendation Q.731,