switching cable

This paper states the first opened digital railway division communication system which is constructed with Δ M multiplex transmission system and digital division telephone switching system on the toll symetrical cable at Zhengzhou-Luoyang Railway Division.

本文介绍了在郑州&洛阳区段的长途对称电缆上开通的我国铁路第一个数字式区段通信系统，它由△M多路复用传输系统和数字式区段电话交换系统构成。

At the same time, the cable wrap problem caused by rotation of feed switching mechanism at different elevations is solved by using tilting cable wrap mechanism.

同时，通过采用可倾覆使用的绕线机构，解决了天线在不同仰角条件下换馈机构旋转时带来的电缆缠绕问题。

Realization Way and Characteristic of the Cable TV Network Back-up Electric Power System Switching Automatically

有线电视网络备份供电系统自动切换的实现方式与特点