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在地铁/轻轨环境中,通信系统是实现行车指挥和列车运营管理的重要手段,是保证行车安全、提高运营效率不可缺少的技术措施。通信系统一般由光纤传输子系统、公务通信子系统、无线通信子系统、专用调度电话子系统、站内及轨旁电话子系统、闭路电视监视(CCTV)子系统、有线广播(PA)子系统、时钟子系统、UPS电源子系统和通信系统综合网络管理子系统等组成。传输系统不仅能传输通信各子系统的话音、数据、文字及图像信息,而且可传输其他专业如信号ATS、电力SCADA、防灾报警FAS、环控BAS、自动售检票AFC等集中监测监控的实时和非实时的信息,因此传输系统是一个综合业务传输网,它必须是可靠的、冗余的、可扩展的、可重构的、灵活的(多种
In the subway / light rail environment, the communication system is an important means to realize traffic command and train operation management, and is an indispensable technical measure to ensure traffic safety and improve operational efficiency. Communication systems are generally composed of optical fiber transmission subsystem, business communication subsystem, wireless communication subsystem, dedicated scheduling telephone subsystem, station and trackside telephone subsystem, closed circuit television monitoring (CCTV) subsystem, cable broadcasting (PA) subsystem, Clock subsystem, UPS power subsystem and communication system integrated network management subsystem. The transmission system can not only transmit the voice, data, text and image information of each subsystem of the communication, but also can transmit the real-time of the centralized monitoring and monitoring such as signal ATS, power SCADA, disaster prevention alarm FAS, And non-real-time information, the transmission system is an integrated service transport network that must be reliable, redundant, scalable, reconfigurable, flexible