京郑电缆ＰＣＭ系统开通后的问题及解决措施张祖基＊近年来，在京郑干线上相继开通了电缆ＰＣＭ系统。该系统的开通对改善京郑线区段通信，缓和区段通信紧张状况，普及各站自动电话等方面发挥了重要的作用。现介绍该系统开通后，存在的问题及解决措施。１ＰＣＭ系统开通后... Problems and Solutions after the Opening of Jingzheng Cable PCM System Zhang Zuji * In recent years, the cable PCM system has been launched on the Beijing-Zhengzhou trunk line. The opening of the system has played an important role in improving the section of Jing-Zheng Line communications, alleviating the tension in section communications and popularizing automatic telephone calls at various stations. Now introduced after the opening of the system, the problems and solutions. 1PCM system opened ...