HP LaserJet Enterprise M4555 MFP series - Manual (Page 258)

Problem Cause Solution
Your phone line might be noisy or poor
quality Try using a lower baud rate to improve
the reliability of transmission. See
maximum baud rate setting.
A call-waiting feature might be active Verify that the fax telephone line does
not have an activated call-waiting
feature. A call-waiting notice can
interrupt a fax call in progress, which
causes a communication error.
The fax accessory is receiving
faxes but is not sending them. If the fax accessory is on a PBX system,
the PBX system might be generating a
dial tone the fax accessory cannot
detect. Disable the detect dial tone setting.
There might be a poor phone
connection. Try again later.
The fax machine to which you are
sending might be malfunctioning. Try sending to another fax machine.
Your phone line might not be working. Disconnect the fax accessory from the
phone jack, and connect a phone. Try to
make a phone call to ensure the phone
line is working.
Outgoing fax calls keep dialing. The fax accessory automatically redials
a fax number if the Redial on Busy
option is set to on or if the Redial On No
Answer is set on. This is normal operation. If you do not
want the fax to retry, set Redial on Busy
to 0 and set Redial On No Answer to 0.
Faxes you send are not arriving
at the receiving fax machine. The receiving fax machine might be
turned off or might have an error
condition, such as being out of paper. Call the recipient to make sure the fax
machine is turned on and ready to
receive faxes.
A fax might be in memory because it is
waiting to redial a busy number, or
there are other jobs ahead of it waiting
to be sent. If a fax job is in memory for either of
these reasons, an entry for the job
appears in the fax log. Print the fax
activity log, and check the Result
column for jobs with a Pending
designation.
Error codes
If a fax problem occurs which prevents or interrupts sending or receiving of a fax, an error code is
generated that will help in determining the cause of the problem. Error codes show up in the fax activity
log, the fax call report, and the T.30 protocol trace. Print one of these three reports to obtain the error
code. A detailed description of the error codes and the appropriate action can be found at
www.hp.com by searching for HP LaserJet Analog Fax Accessory 500.
Fax error messages
When an analog fax is sent or received on an HP LaserJet product, any errors that occur during the fax
process will be displayed on the product control panel and entered into the fax reports. Fax errors can
occur for many reasons and often they are due to interruptions or noise on the telephone connection.
238 Chapter 11 Fax ENWW