Using a dedicated fax line
If you connect the HP LaserJet all-in-one device to a telephone line that is used only for fax
calls, you might want to connect the following devices:
Modem: You can connect a computer modem (external or internal) to the fax line if you
want to use the fax line for e-mail or for access to the Internet, but you cannot send or
receive faxes while using the line for these purposes.
Extra telephone: You can connect an extra telephone to the fax line if you want to
make outgoing calls on the fax line.
not connect the following devices:
Answering machine or computer voicemail: If you use computer voicemail, you must
connect a modem (external or internal) to your dedicated voice line. Then, use the
dedicated voice line to connect to the Internet and receive voicemail.