该方案利用频移键控频分复用（FSK FDM）技术进行声频副载波调制，通过光强度调制实现远程在线EDFA监控信息随主信号的传输。

In the scheme, FSK-FDM technique is used in subcarrier modulation, and the EDFA's supervisory information is transmitted by optical intensity modulation.

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当事件发生时，与这个事件对应的对象发出信号，通知主循环事件已经发生。

When an event occurs, the object associated with that event emits a signal to inform the main loop that it has occurred.

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随后，主代理向普通代理发送信号，使其脱机。

Then, the Master Agent tool sends a signal to the General Agents that causes them to go offline.

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