Private Telecommunication Network (PTN); signalling protocol at the S-reference point; circuit mode basic services; English version ETS 300192:1992
国外标准现行
标准号:DIN ETS 300192-1993
标准名称: 专用远程通讯网络(PTN).基准点S信令协议.线路式基本服务
英文名称:Private Telecommunication Network (PTN); signalling protocol at the S-reference point; circuit mode basic services; English version ETS 300192:1992