在主站点发生中断时，应用程序将自动切换到备用站点，但如果您愿意，也可采用手动流程。

When an outage occurs at the primary site, the apps switch automatically to the standby site although a manual process is available if preferred.

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以此实现了报警和手动、自动切换功能。

To achieve the alarm and manual, automatic switching function.

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它采用了信道冗余模型，支持信道的自动和手动切换。

It adopts a channel redundancy module and thus supports automatic and manual channel switching.

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