目前在我国铁路各主要干线上已经安装了无线列调电话。几年来实践证明,这种现代化的通信设备对保证行车安全和提高运输效率上发挥了很大的作用,仅从防止重大行车事故方面挽回的损失就远远超过安装全部设备的投资。获得很大的经济效益。但是,据我们了解全路运用的情况也不尽相同,有些干线运用情况较为正常,收效显著,得到司机、值班员和调度员的欢迎,成为他们之间进行通信联络必不可少的工具。相反,也有的区段运用情况不够正常,用户经常闭机,久呼不应,发挥不了什么作用。这里固然有许多客观原因,例如:设备维修质量是否良好;执行管理制度是否认真;各部门相互配合是否密切等种种因素。除此之外,根据我们在这几年使用的经验教训,我们认为目前全路广泛使用的TW-8A型(包括同 At present, wireless telephone lines have been installed on all major railways in our country. Over the past few years, it has been proven that this modern communication equipment has played a significant role in ensuring traffic safety and improving the efficiency of transportation. The losses recovered from the prevention of major road accidents far outweigh the investment in installing all equipment. Obtain great economic benefits. However, as far as we know, there are also different situations in which the whole route is used. Some of the routes are more regular and effective. They are welcomed by drivers, attendants and dispatchers and become indispensable tools for communication between them. On the contrary, there are some sectors of the situation is not normal enough to use, users often closed, long time no response, can not play any role. Although there are many objective reasons here, such as: the quality of equipment maintenance is good; the implementation of management system is serious; the various departments are close coordination and other factors. In addition, based on the lessons we have used in these few years, we believe that TW-8A, which is widely used today