SDH网络拓朴和网络单元及PDH向SDH过渡

SDH Network Topology, Network Element and Transition from PDH to SDH

本文介绍线形、环形、星形和网孔形等四种常用的ＳＤＨ网拓朴结构。文中还阐明了ＯＬＴＥ、ＡＤＭ、ＤＸＣ等三种基本ＳＤＨ网络单元的功能和ＳＤＨ同步帧结构。最后讨论了ＰＤＨ向ＳＤＨ过渡的方式。

This paper presents four kinds of common SDH network topological structures,i. e. linear,ring,star and meshed. Functions of three kinds of basic network elements (OLTE, ADM, DXC) and SDH synchronous frame structure are explained. Finally, transition mode from PDH to SDH is discussed.