It introduces the functions and characteristics of railways telex automatic switch network the volume control of telex network operation guarantee of network and effects of network operation .

介绍了铁路电报自动交换网的功能特点， 电报 网的流量控制，网络运行保障及效果。

Telex network identification code

国际 电传 打字 电报码 用户 电报 网路识别编码

During the 30 years of hard working for TMIS it has been gone through three stages : point to point / terminal network of telex ; special protocol network and open network . At last the LAN covering all the country has been completed .

铁路计算机网络在近30年的建设过程中，历经点到点/ 电传终端网、专用协议 网络和开放网络3个建设阶段，形成了全国规模的大型计算机网络。

Numbering for telex and low speed data in national communication network

GB/T7438-1987国家通信 网 用户 电报及低速数据编号