For fulfill the requirement that a variety of media transmitted by wide area network in highway, the working principle and technical features of DPT technology are analyzed using contrast method, and the DPT technology is used in engineering practice of the highway network. A good solution of DPT technology can be obtained to meet that a variety of media can be transmitted by wide area network in highway.%为了高速公路广域网络传输多种媒体的需要,采用对比的方法分析了DPT技术的工作原理与技术特点,并在高速公路联网的工程实践具体应用了DPT技术,得出了DPT技术可以很好地解决高速公路广域网络传输多种媒体的需求.
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