铁路区段通信是直接为现场运输生产服务的。沿线各车站、工区的工作人员为了保证铁路运输生产的安全、准确、迅速和协调,需要进行各种公务通信联系,区段通信就是为此而装设的。它是铁路通信的一个重要组成部分。从六十年代以来铁路通信的一个显著特点是通信方式的自动化。许多国家的铁路区段通信大都从原来的人工转接变为自动化。如美国大北铁路的某些小站用户可以拨号呼叫整个大北铁路线上任何地点的 Railway section communication is directly for the production of on-site transportation services. In order to ensure the safety, accuracy, speed and coordination of railway transport production, staffs at stations and work areas along the railway line need to make various official communications and communications, and section communications are provided for this purpose. It is an important part of railway communications. A notable feature of railway communications since the 1960s is the automation of communications. In many countries, most of the railway sector communications have been transformed from the manual conversion to automation. Such as the United States Dabei Railway station users can dial some of the entire Dabie railway line anywhere