Install capi4hylafax by entering the following commands in the terminal:
sudo apt update sudo apt install capi4hylafax
Faxing over CAPI 2.0 device
If you have working capi20 interface, use this package to send and receive fax over capi. It can be used as a "fax-modem" for a hylafax-server or as stand alone version. Be sure you have a recent kernel with capi4linux compiled in. . Please read /usr/share/doc/capi4hylafax/README.Debian to make things working.