The mgetty package contains a "smart" getty which allows logins over a
serial line (i.e., through a modem). If you're using a Class 2 or 2.0
modem, mgetty can receive faxes. If you also need to send faxes,
you'll need to install the sendfax program.
If you'll be dialing in to your system using a modem, you should
install the mgetty package. If you'd like to send faxes using mgetty
and your modem, you'll need to install the mgetty-sendfax program. If
you need a viewer for faxes, you'll also need to install the
mgetty-viewfax package.