Lexmark 5300 Series Fax Error, Fax Mode Unsupported, Remote Fax Error, CHECK PHONE LINE, LOWER THE TRANSMISSION SPEED

Fax Error
The fax machines have stopped communicating.
Resend the fax. There may have been a problem with the quality of the telephone line connection.
Fax Mode Unsupported
The receiving fax machine does not support the type of fax you attempted to send. If it does not support:
•Your scan resolution—lower the scan resolution.
1From the control panel, press Fax Mode.
2Press .
3Press or repeatedly until Quality appears.
4Press .
5Press or repeatedly until a lower quality appears.
6Press .
•Legal-size paper—reformat the document on letter-size paper.
Remote Fax Error
These are possible causes and solutions. Try one or more of the following:
CHECK PHONE LINE
Resend the fax. There may have been a problem with the quality of the telephone line connection.
LOWER THE TRANSMISSION SPEED
1From the control panel, press Fax Mode.
2Press .
3Press or repeatedly until Fax Setup appears.
4Press .
5Press or repeatedly until Dialing and Sending appears.
6Press .
7Press or repeatedly until Max Send Speed appears.
8Press .
9Press or repeatedly until a lower speed appears.
10 Press .
Notes:
•The lower the transmission speed, the longer it will take your fax to send.
•This solution will reduce the speed for future faxes until you reset the transmission speed.
Troubleshooting
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