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全国PDH干线网管系统开发联调合同最近在京签字。此系统是邮电部电信总局提出要建立的7大管网系统之一，其任务是将全国21条光缆干线线路，7条微波干线全部集中到邮电部网管中心及电总传输维护处，做到集中监控，故障可映射到相应电路并提供报表统计功能。中国邮电工业总公司所
National PDH trunk network management system development joint swap contract recently signed in Beijing. This system is one of the seven major pipe network systems put forward by the General Administration of Posts and Telecommunications of the Ministry of Posts and Telecommunications. Its task is to concentrate all 21 optical cable trunks and seven microwave trunks in the Ministry of Posts and Telecommunications Network Management Center and the General Electric Transmission Maintenance Department Centralized monitoring, fault can be mapped to the corresponding circuit and report statistics. China Posts and Telecommunications Corporation headquarters