早期有线电视网络大多采取架空明线的方式敷设 ,随着城市发展的要求和创建标准化大道、标准化小区对架空明线的限制 ,将有越来越多的有线电视线路进入地下。线路入地后 ,受风、雨、雪等自然灾害的影响以及人为破坏的可能性将大大减少 ,提高了系统运行的可靠性 ,减少了线路维护 Most of the early cable television networks were laid overhead overhead lines. As the requirements of urban development and the restrictions on the construction of standardized avenues and standardized cells over overhead open lines, more and more cable television lines will enter the underground. After the line enters the site, the influence of natural disasters such as wind, rain, snow and the possibility of man-made damage will be greatly reduced, the reliability of system operation will be improved and the line maintenance will be reduced