Linux and BSD can scan documents and fax using SANE.
apt install xsane
Optionally you may similarly install the SANE GUI front-ends, as
Open scanning GUI
xsaneautomatically scans for connected scanners. You should see the name of your scanner in the titlebar of each xsane window in a few seconds.
If you have trouble, try
You can send faxes using Xsane as well.
install Fax frontend
apt install mgetty-fax
Configure Xsane for Fax (site down) http://www.xsane.org/doc/sane-xsane-setup-fax-doc.html