ITU-T Q.731.1 SPANISH-1996
第3阶段.使用SS NO.7直接拨入综合业务数字网(ISDN)的编号标识补充业务的描述.系列Q:交换和信令;NO.7信令系统的规范.综合业务数字网(ISDN)补充业务.11号研究组.15pp
Stage 3 Description for Numbering Identification Supplementary Services Using SS No. 7: Direct-Dialling-in (DDI) - Series Q: Switching and Signalling; Specifications of Signalling System No. 7 - ISDN Supplementary Services Study Group 11; 15 pp [Supersede