针对目前城域网建设中存在的问题，介绍光缆交接箱的原理、功能以及在城域网建设中的应用。
To counter the problems existing in the establishing of MAN (metropolitan area network), the author puts forward fiber-optic cabinet, introduce its principle functions and application in MAN.
简要介绍了城域网的基本概念、网络结构、规划原则，并针对中国铁通城域网建设论述了解决方案。
The essential concepts, network structure and programming principle of metropolitan area network (MAN) are introduced briefly. And the solution for MAN construction of China Railcom is discussed.
本文对城域网的拓扑结构、介质访问控制协议及国际上城域网研究动态进行了综述。
This paper gives an overview of topologies, medium access control protocols and current status for metropolitan area networks.
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