但是也有可能是任务时钟或通讯设备退化，这意味着它试图按错误的频率通信。

But it's also possible that the mission clock or communications equipment may have degraded, meaning that it's trying to communicate on the wrong frequencies.

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通信设备主要包括EPON通讯设备(olt、onu)及电力线载波通信机。

The communications equipment, including EPON communications equipment (OLT, ONU) and power line carrier communication equipment.

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