Signalling Procedures - Normal Call Set-up Procedures for International Working - Specifications of Signalling Systems R1 and R2 (Study Group XI) 1 pp
国外标准现行
标准号:ITU-T Q.460-1989
标准名称: 信号程序国际工作的常规设置程序
英文名称:Signalling Procedures - Normal Call Set-up Procedures for International Working - Specifications of Signalling Systems R1 and R2 (Study Group XI) 1 pp