程控数字交换模拟系统设计

The Design of a Simulated System of Stored Program Control Switch

在廉价的微机上实现程控数字交换机的模拟，该“模拟交换机”所有硬件动作均由软件模拟完成，它能进行呼叫处理，并有各种信号音、振铃和通话等各种功能。

Now a stored program control switch is simulated on a cheap micro-computer. All hardware movements of it are realized by software simulation, and calling processing can be carried out. It has various functions such as signal tone, ringing and talking etc..