本文主要是对城域网中一种新型的数据传输技术—弹性分组环（RPR），进行了详细地探讨和深入地研究。
In this paper, one new data transport technology named Resilient Packet Ring (RPR) in metropolitan area networks is discussed and anayzed in a great extend.
本课题的研究目的是设计一种MSTP网络方案，可以实现本地业务的综合接入，能够在城域网中与其它设备交换业务数据。
The purpose of the project is to design a MSTP network scheme and to realise the composite accessing to local services and to exchange service data with other equipment in MAN.
城域网能够同时撑持数据和声音的传输，以至能够和本地有线电视连连通起来。
A MAN can support both data and voice, and might even be related to the local cable television network.
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