单片机控制的多路办公电话系统的硬件设计

The multi-channels office phone system controlled by a microcontroller

描述了用８０３１单片机控制的多路办公电话系统．该系统采用频分多路复用技术，可以在一条通讯线路上同时实现多路通讯；利用单片机控制自动选择通讯讯道，使讯道之间互不干扰，入网的所有电话机之间均可通话．这种系统成本低、安装方便、通话语言清晰，是宾馆、饭店、企事业单位内部办公电话的最佳选择．

This paper describes the multi-channels office phone system controlled by 8031 microcontroller. We adopt the FDM technique of frequency to achieve the function of multi-channels collinlunication on a single line at the same time. The microcontroller is used to choose automatlcally the communication channel,so that the communication channels do not interfere with each other when two phones among all phones are working. The practice 1)roves that the system has the advantages of clear sound easy installation and low cost. It may be widely used in guesthouses,hotels,enterprises and institutions.