Embedded terminal collects and deals with elevator information ; monitor center receives elevator status signal and sends elevator commands by communicating with embedded terminal ; filiale subsystem collects monitor requests of filiale users 嵌入式终端完成电梯信息的采集与处理；监控中心通过与嵌入式终端通讯获取电梯状态信息或控制电梯运行；分公司子系统的服务器接受分公司用户的监控请求。
