Install t38modem by entering the following commands in the terminal:
sudo apt update sudo apt install t38modem
Description:
T.38 Fax over IP pseudo modem
From your fax application view point it's a fax modem pool. From IP network view point it's a H.323 endpoint with T.38 fax support. From your view point it's a gateway between a fax application and IP network.
Homepage: http://t38modem.sf.net/
Version: 2.0.0-4build3
Section: universe/comm