sdh理论概述及传输基础维护知识new

《sdh理论概述及传输基础维护知识new》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、目录第一部分理论概述及传输基础维护知识..................................................................................................1第一章SDH原理........................................................................................................................................

2、....1第一节SDH概述........................................................................................................................................11.1SDH产生的技术背景...................................................................................................

3、...................11.2与PDH相比SDH有哪些优势.......................................................................................................31.3SDH的缺陷所在..............................................................................................................

4、................5第二节SDH信号的帧结构和复用步骤..................................................................................................72.1SDH信号STM-N的帧结构..............................................................................................................72

5、.2SDH的复用结构和步骤..................................................................................................................92.3映射、定位和复用的概念..........................................................................................................18第三节开销和指针....

6、..............................................................................................................................213.1开销.................................................................................................................................

7、..............213.2指针...............................................................................................................................................28第四节SDH设备的逻辑组成...................................................................................

8、..............................334.1SDH网络的常见网元....................................................................................................................334.2