HP LaserJet Pro CM1415fnw Color Multifunction Printer - Manual (Page 175)

From the computer, in the HP program folder, run the Fax Setup Utility.
5. Verify that the telephone service supports analog fax.
● If using ISDN or digital PBX, contact your service provider for information about configuring
to an analog fax line.
● If using a VoIP service, change the Fax Speed setting to Slow(V.29) or disable Fast(V.34)
from the control panel. Ask if your service provider supports fax and for the recommended fax
modem speed. Some companies might require an adapter.
● If using a DSL service, ensure that a filter is included on the phone line connection to the
product. Contact the DSL service provider or purchase a DSL filter if you do not have one. If
a DSL filter is installed, try another since these filters can be defective.
6. If the error persists, find more detailed problem-solving solutions in the sections that follow this
one.
ENWW Solve fax problems 159