This paper introduces the component and principle of Digital Program Control Exchange Experimental System, as well as the realization of the hardware and software.
介绍一种数字程控交换实验系统的组成和原理，以及系统硬件和软件的实现。
The most attractive thing is that the Digital Program Control Switch System is widely applied, which is the foundation of the digitalization for the whole network.
其中最引人注目的就是广泛采用了程控数字交换机，为全网的数字化奠定了基础。
The Digital Program Control Switch System, which based on the circuit switch, is still the main means of telecommunication field and plays an important role in the telecom network system.
以电路交换为基础的程控交换技术在当前的通信网中占有重要比重，它仍是当前通信的主要手段和研究内容。
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