设计并实现了利用较先进的电力线通信系统构成的公用数据采集网。

The design and realization of the network are based on an advanced electric wire communication system.

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系统还利用由MODEM和公用电话交换网组成的通讯线路进行远程数据传输。

And that, teledata transfer are realized through Lines of Communication which is build-up by MODEM and Public Switched Telephone Network.

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本文介绍了公用和专用分组交换数据网的现状后，说明了开展标准的增值业务系统的重要性。

In this paper, after analysing the status on public and private PSDN, the significance of standard-based value added service systems is indicated.

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