The present invention relates to communication method, communication system, communication manage server and communicationcontroldevice using public network as virtual special network.
本发明涉及将公众网络作为虚拟的专用网络使用的通信方法、通信系统、通信管理服务器以及通信控制装置。
2
The device with global positioning system (GPS) localization and communication with monitor and control center on construction machinery is a key equipment for construction machinery group management.
智能化工程机械的GPS定位与监控中心的通信装置是实现工程机械机群化管理的关键装置。
3
Network interface unit (NIU) is an interface device between the control computer and the communication network.