Switch documentation for technical details to understand the exchange of learning principles of communication systems and works

交换技术\前言2009.ppt
........\第一章概论2009.ppt
........\第三章电路交换技术及接口电路2009.ppt
........\第二章交换单元与交换网络20091.ppt
........\第六章信令系统2009.ppt
........\第四章存储程序控制原理2009.ppt
交换技术

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