Error Message:
Fax Mode Unsupported
Unsupported Compression
Unsupported Resolution
Unrecoverable Fax Error
Fax Modem Error
Phone Line is connected to the incorrect jack on the back of the machine.
Digital line detected
Failed to Connect
Phone Line Error
Phone Line Not Connected
What it indicates:
The receiving fax machine does not support color fax or the scan resolution of the document that you are sending.
The fax modem of the receiving fax machine does not support data compression. Fax modems compress data to speed up transmission, but the receiving fax modem needs to have the same compression code.
The receiving fax machine does not support the scan resolution of the document that you are sending.
The fax modem encountered critical errors.
The fax modem of the printer may be busy, or the fax modem may have encountered problems during transmission.
The telephone cable is connected to the wrong port on the back of the printer.
The printer is connected to a digital line.
The printer cannot detect a dial tone.
Possible solutions:
•Enable Auto Fax Conversion. The printer automatically converts color faxes to black and lowers the scan resolution of the document.
•Lower the fax quality.
•Reformat the document on
•Lower the transmission speed of the fax modem, and then resend the fax.
•Enable Auto Fax Conversion.
•Lower the fax quality.
•Enable Auto Fax Conversion.
Turn off the printer, turn it back on, and then resend the fax.
Turn off the printer, turn it back on, and then resend the fax.
Connect the phone cable to the 
port on the back of the printer.
The printer is an analog device and must be connected to an analog line. To connect the printer to a digital line, you must use a digital line converter or a filter.
For more information, see the ”Setting up the printer to fax” section.
See the “Fax troubleshooting checklist.”
Troubleshooting
