The system consists of remote video surveillance monitoring center and background control center which conducts data transmission between remote port and background platform through 3g network.
该系统由远端视频监控和后台监控中心两大部分组成，通过3 G网络进行远端与后台间的数据传输。
Through GPRS network structure, operating principles, data transmission platform and PPP agreement on the basis of understanding and achieving GPRS module PPP dial-up functions.
通过对GPRS网络结构、工作原理、数据传输平台和PPP协议的认识的基础上，实现GPRS模块PPP拨号上网的功能。
Through the test, we found that using the CDMA wireless network, which is time synchronous in the whole net , to carry on data transmission can bring us great convenience.
经测试，发现使用全网时间同步的CDMA无线网络，进行数据传输可以给定位系统带来很大的便利。
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