一、系统的提出及功能目前我国铁路交通中的通信主要通过无线通信设备组成。经调查发现，在目前新建的铁路中，山区铁路占了很大比重。由于在这些特殊的地理环境下，无线信号的传输受到很大干扰，因此，采用有线信号传输是一种比较合理经济的通信方式。在我国现有的铁路通信系 First, the system proposed and functions At present, China’s railway traffic communications mainly through wireless communications equipment. The survey found that in the newly built railway, the mountain railway accounts for a large proportion. Since the transmission of wireless signals is greatly disturbed in these special geographical environments, the use of wired signal transmission is a more reasonable and economical method of communication. In our country existing railway communication department