电话交换系统“公专合一”与“公专分离”模式的技术经济效益分析

在城市轨道交通通信网络中,控制中心、车辆段、停车场以及各个车站处在网络节点的位置上,采用交换设备来实现网络汇接与终端接入.轨道交通系统通常有多个业务独立的电话系统.当前,实现这些电话系统的规划建设有"公专分离"和"公专合一"两种模式.从技术经济效益的角度对两种模式进行分析比较,认为"公专合一"模式更经济可靠.

Technical & Economic Profit Analysis on Office-Private Swithings for URT Telephone System

On URT communications network,the control center,vehicle section,parking lot and stations are all on the network nodes,the network tandems and terminals are implemented with switching equipments.Usually,a railway transportation communications sytem requires many indi- vidual telephone systems,such as the office telephone sys- tem,the dispatch telephone system,the inter-station tele- phone system,the station telephone system and railway ma- intenance telephone system,etc.At present,the there are two layout m...