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Error Message: What it indicates: Possible solutions:
Unsupported Compression
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.
• Lower the transmission speed of the
fax modem, and then resend the
fax.
• Enable Auto Fax Conversion.
Unsupported Resolution
The receiving fax machine does not
support the scan resolution of the
document that you are sending.
• Lower the fax quality.
• Enable Auto Fax Conversion.
Unrecoverable Fax Error
The fax modem encountered critical
errors.
Turn off the printer, turn it back on, and
then resend the fax.
Fax Modem Error
The fax modem of the printer may be
busy, or the fax modem may have
encountered problems during
transmission.
Turn off the printer, turn it back on, and
then resend the fax.
Phone Line is connected to
the incorrect jack on the
back of the machine.
The telephone cable is connected to
the wrong port on the back of the
printer.
Connect the phone cable to the
port
on the back of the printer.
Digital line detected
The printer is connected to a digital
line.
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.
Failed to Connect
Phone Line Error
Phone Line Not Connected
The printer cannot detect a dial tone. See the “Fax troubleshooting checklist.”
Phone Line Busy
Your telephone line or the telephone
line of the receiving fax machine is
busy. This happens especially if the
printer is sharing the line with other
devices (telephone, answering
machine).
• Set the printer to redial.
• Increase the time between the
redial attempts.
• Place a test call to the number to
which you want to send a fax to
make sure that it is working
correctly.
• If the telephone line is being used
by another device, then wait until
the other device is finished before
sending the fax.
• Schedule to resend the fax at a later
time.
• Set the printer to scan before
dialing. The scanned document is
saved in the printer memory. The
printer can then retrieve it and
automatically redial the number.
Troubleshooting 155