Приложение: Efax-gtk 
  Интернет, сети  Faxing with Linux/Unix
  [  О приложении  ] 
Efax-gtk is a GUI front end for the 'efax' fax program.
 It can be used to send and receive faxes with a fax modem, and to view, print and manage faxes received.
 It also has a socket interface to provide a "virtual printer" for sending faxes from word processors and similar programs, and can automatically e-mail a received fax to a designated user, and automatically print a received fax.
 Источник 
  Репозиторий: flathub
FlatPak:  Efax-gtk  [Productivity]