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研究了ＳＤＨ网络管理系统和ＳＤＨ子网级管理系统的通信结构，以及与ＳＤＨ网络运行密切相关的模块——告警与性能管理模块的实现．分析了通过ＳＤＨ管理系统各个层次之间的通信如何实现告警数据和性能数据的充分利用．
The communication structure of SDH network management system and SDH subnet management system is studied, and the module of alarm and performance management is closely related to the operation of SDH network. It analyzes how to realize the full utilization of alarm data and performance data through the communication between all levels of SDH management system.