论述采用PSTN电话网，建立“虚拟”多点数据监测的依据和实现方法，实现利用既有PSTN电话网络和线路资源，完成多种信息采集、传送功能。
To make a good use of resource of the PSTN telephony lines, to complete various functions of data collection and transmission is also presented.
论述采用PSTN电话网，建立“虚拟”多点数据监测的依据和实现方法，实现利用既有PSTN电话网络和线路资源，完成多种信息采集、传送功能。
To make a good use of resource of the PSTN telephony lines, to complete various functions of data collection and transmission is also presented.
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