HP LaserJet Enterprise 700 color MFP M775 series - Manual (Page 313)

Problem Cause Solution
Outgoing fax calls keep dialing. The fax accessory automatically redials
a fax number if the
Redial On Busy
option is on or if the Redial On No
Answer option is on.
This is normal operation. If you do not
want the fax to retry, set the
Redial On
Busy option to 0, set the Redial On No
Answer option to 0, and set the Redial
on error option 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. Ask 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
displays in the fax log. Print the fax
activity log, and check the Result
column for jobs with a Pending
designation.
ENWW Solve fax problems 299