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Question:

What are the two cable sockets behind the UPS uninterruptible power supply?.

What are the two cable sockets behind the UPS uninterruptible power supply?.Please tell me how to use it.

Answer:

If the thunder is over voltage, it is possible to damage the power equipment through the wire / telephone line. Plug in / out plug on the UPS can provide some protection for the telephone line
Check the instructions! It should be used to transmit the UPS alarm signal!
Isn't there a "network /FAX/MODEM surge protection socket"?"Surge" means a sudden increase in current flow over its rated voltage,

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