By utilizing the advantages of self-healing function that SDH ring network has, the paper analyzes the networking technology and MSP mechanism in detail.
利用SDH环形网络具有自愈能力的优点，详细分析了组网技术及复用段保护机制。
SDH self-healing mechanism is an important aspect in SDH survivability research, and also the key factor for ensuring SDH network operation-smoothly.
SDH网的自愈机制是SDH网生存性研究的主要内容，也是确保SDH网正常运行的关键。
SDH self-healing mechanism is an important aspect in SDH survivability research, and also the key factor for ensuring SDH network operation-smoothly.
SDH网的自愈机制是SDH网生存性研究的主要内容，也是确保SDH网正常运行的关键。
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