Install dahdi-linux by entering the following commands in the terminal:
sudo apt update sudo apt install dahdi-linux
Description:
DAHDI telephony interface - Linux userspace parts
DAHDI (formly Zaptel) is an interface for telephony devices used by e.g. the Asterisk PBX software. The dahdi-* packages provide the kernel DAHDI kernel modules and their required setup environment. . This package includes the minimal Linux-specific userspace parts: udev configuration, xpp initialization scripts.
Homepage: http://www.asterisk.org/
Version: 1:2.11.1~dfsg-1ubuntu4
Section: universe/comm