HP Compaq Presario,Presario 5116 Quick Start Manual page 113

Symptom
Cannot send or receive faxes.
Connection has failed.
Problems
Fax modem is not
connected properly.
Telephone number is
not properly entered or
number being dialled
is not a fax number.
Computer or fax
machine is turned off,
or third-party program
is closed.
Fax modem has failed.
Solutions
Reconnect the fax modem, verifying the
following connections: telephone line to
telephone (for external phone sets) and
telephone line to wall jack (from computer
to wall).
Verify whether mandatory area code is included
in number being dialed and correct fax number
is being dialed.
Some third-party fax software can receive faxes
only when the program is open.
Call Compaq Technical Support. Refer to your
Certificate of Warranty for details.