Guide to Communication Theory is the study of Information Directory good he is my door to the school level courseware limited ah

第三章数字通信技术
..................\数字通信技术1xi.ppt
..................\数字通信技术2xi.ppt
..................\时分复用1.ppt
第四章 程控交换技术
...................\信令及信令系统1.ppt
...................\程控交换技术1.ppt
...................\程控数字交换机基本结构.ppt
...................\第四章作业.ppt

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