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Xerox error 303-503

A fax error with the remote machine.

Seen on: WorkCentre 6515. The same code can mean something else on other models.

How to fix it

1. Check the phone line is plugged into the correct port on the back of the printer and into the wall socket.
2. Try sending again, or to a different fax number to test.
3. If it continues, contact Xerox support.

Is it worth fixing?

Usually the line or the other fax machine, not your printer.