本文介绍了一种应用于特殊场合的电话指挥台。该电路特点是用电容、稳压二极管线路取代了铁芯线圈线路,使结构体积小,重量轻,而且其它器件皆为普通类型,市场上极易购到。一种新式的由单板计算机控制的电话交换指挥台已于一九八五年九月完成,这是由中国科学院近代物理所计算机室研制的。该机主要用于野外而又要求不使用无线电话的场 This article describes a telephone podium used for special occasions. The circuit is characterized by capacitors, Zener diode circuit to replace the core coil circuit, the structure of small size, light weight, and other devices are all common types, the market is extremely easy to buy. A new single-board computer-controlled telephone exchange podium was completed in September 1985 and was developed by the Computer Laboratory of the Institute of Modern Physics, Chinese Academy of Sciences. This machine is mainly used in the field and does not require the use of wireless telephone field