Case J: Shared voice/fax line with computer modem and answering machine
If you receive both voice calls and fax calls at the same phone number, and you also have
a computer modem and answering machine connected on this phone line, set up the printer as
described in this section.
Since your computer dial-up modem shares the phone line with the printer, you cannot use
both your modem and the printer simultaneously. For example, you cannot use the printer for faxing
while you are using your computer dial-up modem to send an email or access the Internet.