鉴于同步数字体系SDH环形网络结构的巨大成功，WDM环形网络必定首先实用化、商用化，本文着重对各种保护恢复机制的自愈环网进行了分析与比较。
Whereas the vast success of SDH networks, it is WDM rings to be a fact firstly. Some kinds of WDMself-healing rings are discussed and compared.
鉴于同步数字体系SDH环形网络结构的巨大成功，WDM环形网络必定首先实用化、商用化，本文着重对各种保护恢复机制的自愈环网进行了分析与比较。
Whereas the vast success of SDH networks, it is WDM rings to be a fact firstly. Some kinds of WDMself-healing rings are discussed and compared.
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