Description: In recent years, global communications technology is advancing rapidly, In particular, wireless communications technology development and application rate has exceeded the fixed communications technologies, showing the development trend in full swing. It is not set up transmission lines, the network quickly and easily deployed, reliable and simple debugging advantages. One of the most representative of the cellular mobile communication technology, it makes people realize voice communication anywhere, short message transmission. But for short distance from the automated data collection system, the computer remote monitoring and control systems, vehicle monitoring system, Intelligent Management Area miners and positioning, and other fields, mobile communication system for the installation, o
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