ITU-T Q.731.3-1993
使用7号信令系统的号码识别补充业务第三阶段描述.条款3.呼叫线路标示(Clip).11号研究组[取代:ITU-T Q.731]
Stage 3 Description for Number Identification Supplementary Services Using Signalling System No. 7 Clause 3 - Calling Line Identification Presentation (Clip) (Study Group XI)