论文部分内容阅读
为了提高明线线路利用率,提高通信回路的复用指数。目前,有色金属回路仅对话路来说,继开通三路,十二路到近年来开通高十二路载波电话,共计可开通竟达近三十个话路之多(铁线一般开有三路,计可开通四个话路)。一旦线条,隔电子遭受雷击障碍远比进局终端设备(熔线管)修复困难,历时更长(一般换熔管较容易,且障碍点比终端杆远)阻断通
In order to improve the utilization of open line, improve the reuse index of communication loop. At present, non-ferrous metal circuits are only available on the intercommunication circuit. Following the opening of the third and twelfth roads and the opening of the high-twelve carrier telephony in recent years, a total of up to nearly 30 telephones can be opened up , Count can be opened four channel). Once the lines, separated by lightning strikes the barrier than the incoming terminal equipment (fuse tube) repair difficult, lasted longer (generally easier to change the fuse, and the barrier point than the terminal pole) blocking