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:介绍了采用多路复用的形式传送电话计费信息和网管数据信息的必要性及多路复用的方法和特点 ,介绍了NOKIA的DM2基群复用设备及使用基群复用设备应当注意的问题
This paper introduces the necessity of multiplex transmission of telephone billing information and network management data information and the methods and features of multiplexing. It introduces that NOKIA’s DM2 group multiplexing equipment and the use of group multiplexing equipment should Attention questions