Question about Panasonic KX-FL511 Plain Paper Laser Fax

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Gets busy signal

When someone tries to fax us they get a busy signal and the fax won't go through. I have to unplug the power from the fax machine and plug it back in then the fax will come through. Is the fax broken or is there a quick fix?

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  • 208 Answers

You may simply have a bad phone line from the machine to the wall jack. If the connection is getting flakey it will cause it not to connect.
You could have a sticking relay on the fax modem circuit board.
Also you could just need to reset the machine via the manufacturers directions on how to clear the memory or reset the machine to defaults.
Another question is , do you have any other pieces of equipment on the phone line with the fax? Such as a credit card machine or other device that may be causing the problem. If you have more than one item on the phone line, try plugging only the fax machine into that line and see if that works.
Is there an extension phone built into the machine also? Make sure its not causing a problem either.
That problem has a multitude of issues.
You could also have a phone line problem. If your line voltage is low, line current low or you have alot of DB loss, it can cause that issue.
Sorry I can't narrow it down to one specific issue, but that one has lots of possibilities.

Posted on Dec 05, 2007

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Posted on Jan 02, 2017

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unplug the fax from the phone line. call it from you cell.if you hear your phones ringing in the house, plug the fax machine back into the jack. [you should still be on your cell phone] if the line goes dead or stops ringing, there is a short with the fax machine or wire to the jack.if you hear a busy signal without the fax plugged in, unplug everything you have plugged into phone jacks thruout the house. call your # again.if you hear ringing on your cell phone, plug everything back in one at a time.[again while still on your cell phone] if it was one of the phones plugged into a jack, when you plug the shorted phone back into the jack, the line will go dead again. that phone or cord is the problem.
if still rings busy when everything is unplugged, then call your phone company. it can be an inside wire or jack problem, or the problem is outside your home.
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