Though the development of last few years, the PON technology has been becoming mature and been widely used. It is necessary to realize the technology of PON protection switching in order to guarantee the operational stability of system in engineering application and take countermeasuies against correspondence malfunction. Trie PON protection switching technology which achieve safe,accurate,fast PON protection switching is mainly analyzed and discussed.%经过近几年的发展,PON技术日益成熟,要保障工程应用中业务的稳定性,应对各种通信中断故障,就需要实现PON保护倒换技术.分析设计了1种PON保护倒换机制和流程,可以满足A、B类保护业务中断时间小于150 ms,C类保护业务中断时间小于50 ms,实现安全、准确、快速PON保护倒换.
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