Private branch exchanges for connection to public switched telephone networks run by certain public telecommunication operators - Specification for the procedure for in-service observation of PBXs undergoing type approval
标准号:BS 6450-7-1990
标准名称: 连接由某些公共长途电话接线员操作的专用分组交换机.第7部分:型号审批过程中专用分组交换机使用观察的程序规范
英文名称:Private branch exchanges for connection to public switched telephone networks run by certain public telecommunication operators - Specification for the procedure for in-service observation of PBXs undergoing type approval
标准类型:国外标准
标准状态:现行
发布日期:1990-10-28
实施日期:1990-10-28
中国标准分类号(CCS):M40
国际标准分类号(ICS):33.040.30