系统具有故障诊断、在线监控、动态显示和自动保护功能，并可和其它计算机交换信息。

The system is featured with fault diagnostics, on line monitor, dynamic display and automatic protecting function, and it can interchange informations with other computers.

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自动交换光网络（ASON）是当前光传输领域的研究热点，其中保护恢复策略将为增强网络生存性奠定新的基石。

Presently, ASON is the research hotspot in optical transportation network, in which protection&restoration mechanism can enhance network survivability to a new level.

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文章分析了自动交换光网络(ason)一般的保护机制，并为每种保护机制提供了有效性分析的代数公式。

This paper analyzes the general protection mechanisms for ASON and provides for each of them an algebraic formula for the availability analysis.

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