日本铁路原有的通信系统，分为有线和无线两种：有线系统包括连结调度室到各站段的调度电话、铁路公用电话及日本电报电话、公司电话等；无线系统有行车、客运调度与列车乘务员和各站间的列车调度电话、工务电务等的作业无线电话以及站内调车无线电话等。近年来，特别是1995年1 The original communication system of the Japan Railways is divided into two types: wired and wireless. The cable system includes a dispatching telephone linking the dispatch room to each station, a railway public telephone, a Nippon Telegraph and Telephone, a company telephone, etc. The wireless system includes driving, Train attendants and train dispatching stations between stations, wireless homework telephones and shunting radios. In recent years, especially in 1995 1