高速公路各现场监测站有大量监测数据需要及时传送给监控中心;各个收费站也有大批数据文件要定时传送收费中心,这些传输任务统由通信系统承担。为此,光缆中辟有专门传输数据信号的光纤,将沿公路线的各个站点和各级管理中心连接成一个庞大的数据通信网。 A large number of on-site monitoring stations on the highway need to transmit timely monitoring data to the monitoring center. There are also a large number of data files in each toll station to transmit tolling centers at regular intervals. These transmission tasks are assumed by the communication system. To this end, the optical fiber cable in the provision of a dedicated transmission of optical signals, will be along the highway line at all levels and management centers at all levels into a huge data communications network.