32 路集团用小型可视电话交换系统的实现

IMPLEMENTATION OF SMALL SCALE 32 LINE VISUAL TELEPHONE EXCHANGE SYSTEM USED IN BLOC

可视电话是今后通信领域的一个重要发展领域，但目前可视电话所需的频带太宽且需要巨额投资，所以一直未能得到广泛应用．针对以上问题，本文中提出一个用于小集团的小型可视电话交换系统和现有的公共电话网同时使用的方法．系统采用单片机进行控制，并可与微机接口，管理方便，能够扩展多种功能，是一种成本低，性能价格比好的实现方案．

Visual telephone is an important development field of telecommumications from now on, but the current visual telephone needs wide frequency band and large investment. This is the reason why the current visual telephone can not be used widely. This paper proposed one small scale visual telephone system used with the current public switched telephone network. This system is controlled by a single chip microprocessor, can communicate with a computer, is very easy to control and to manage conveniently, and is functions can be easily extended. From the view of practical application, this is a low cost scheme with high performances.