SDH性能告警机理

广播电视工程技术人员掌握SDH基本知识 ,熟悉SDH性能告警机理 ,对维护SDH传输网尤为重要。介绍SDH帧结构、段开销、通道开销、同步复用和映射基本结构、定位与指针、SDH设备功能模块组成 ,并根据段开销功能、帧定位与指针功能和SDH组成模块功能分析SDH性能告警信号产生机理

An Alarm Mechanism of SDH Function

It is very important for the technologists of broadcasting and TV to grasp SDH basic knowledge and to know an alarm mechanism of SDH function as defending SDH network. Introduces SDH frame, section overhead, path overhead, a basic structure of synchronous multiplexer and mapping, alignment and pointer, a forms of SDH equipment function mould. According to a function of section overhead, a functionof alignment and pointer, a function of SDH mould, analyses an alarm signal mechanism of SDH function.