数字程控交换实验系统及控制单元实验，1。熟悉CVT-CK数字程控交换实验系统的电路组成与主要部件的作用；

2．体会数字程控交换实验系统进行电话通信时的工作过程。-The experimental system of digital telephone switching and control unit experiments. Familiar with the CVT-CK experimental system of digital telephone switching circuit composition of the main components of the role　Experience digital telephone switching experimental system for telephone communication process.