Definition of Supplementary Services - Integrated Services Digital Network (ISDN) - General Structure and Service Capabilities (Study Group XVIII) 6 pp
国外标准现行
标准号:ITU-T I.250-1988
标准名称: 补充业务定义-综合服务数字网络(ISDN)-服务能力 研究组18 6pp
英文名称:Definition of Supplementary Services - Integrated Services Digital Network (ISDN) - General Structure and Service Capabilities (Study Group XVIII) 6 pp