The paper mainly introduced compatibility and its plan of RPR technology and expressway SDH transmission system.
主要介绍RPR技术与现在的高速公路SDH传输系统的兼容，以及实现兼容的方案。
This paper first introduces the RPR technology and its features, then its application in MAN is described. Finally, future prospect of RPR is discussed.
文章介绍R PR技术及其在城域网中的应用，展望rpr技术的发展前景。
Because RPR is a layer 2 MAC-based technology, it can operate over multiple physical layers, including SONET.
由于RPR是第二层基于MAC的技术，所以它能在多个物理层上工作，包括SONET。
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