To Set The Answer Mode - HP LaserJet 3330mfp Handbuch

Note
16 Chapter 1 Setting up
Although most users leave answer mode set to automatic, voice callers
who dial the fax phone number will hear fax tones if the phone is not
answered, or if they do not hang up by the specified number of
rings-to-answer. If you do not want voice callers to hear fax tones, use the
manual setting, but remember that fax calls are not received automatically.

To set the answer mode

To set or change the answer mode, use the following steps:
1 On the control panel, press menu/enter.
2 Using the < and > buttons, select Fax Setup, and press
menu/enter.
3 Using the < and > buttons, select Fax Recv. Setup, and press
menu/enter.
4 Press menu/enter to select Answer Mode.
5 Using the < and > buttons, select Automatic or Manual, and press
menu/enter.
6 The control panel display shows the answer mode setting that you
specified.
ENXC