介绍了有线电视网中AM光缆干线传输综合指标的分析与设计。
The analysis and design of AM cable trunk target in close circuit TV system is discussed in the paper.
新增长途光缆27000皮长/公里，数字微波干线14400公里，电话交换机容量1961万门。
The total lance of long distance optical cable increases by 27000 sheet km, that of digital microwave links by 14,400 km and the number of telephone lines by 19.61 million.
新增长途光缆27000皮长/公里，数字微波干线14400公里，电话交换机容量1961万门。
The total lance of long distance optical cable increases by 27000 sheet km, that of digital microwave links by 14, 400 km and the number of telephone lines by 19.61 million.
目前，先进国家普遍采用硅芯塑管作为光缆通信干线及高速公路通信的管道。
Recent years Silicon Core Tube is widely adopted as pipes of optical cable backbones and expressway communications in developed countries.
增加通信能力，提高电话普及率，以区际干线光缆和城乡电话网为重点。
Increase the ability of correspond by letter, raise the telephone universality rate, take the area trunk line fiber optic cable and the city country telephone nets as the point.
增加通信能力，提高电话普及率，以区际干线光缆和城乡电话网为重点。
Increase the ability of correspond by letter, raise the telephone universality rate, take the area trunk line fiber optic cable and the city country telephone nets as the point.
应用推荐