Exchange of communication essentials from the telephone exchange. Allocation of resources from the communications point of view, the exchange is in some way in accordance with the dynamic distribution of resources of a transmission line operation. Of course, this is a technology, known as the switching technology.

switching technology
....................\现代交换原理-概论.ppt
....................\第三章 程控交换机的接口与外设.ppt
....................\第二章 交换网络.ppt
....................\第五章电话通信网.ppt
....................\第六章信令系统.ppt
....................\第四章、程控交换软件系统.ppt
....................\通信原理复习课浅谈.ppt

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