The article begins with a brief discussion on the present status of local SDH transmission networks,which is followed by fairly detailed descriptions of the hierarchical and ring network structures,the computations of the regenerative sections in equipment allocations,network synchronization and the conditions for their applications.
文章分析和讨论了本地同步数字体系(SDH)传输网络的现状,对分层式网络结构、环网络结构、设备配置中再生段的计算和网络同步问题,及其应用条件作了较为详尽的描述,并从实用的角度对如何组织SDH网络进行了分析,对本地SDH传输网络的发展和规划作了深入浅出的论述,最后强调了传输网络规划在通信网建设中的重要性。