Install dahdi-dkms by entering the following commands in the terminal:
sudo apt update sudo apt install dahdi-dkms
DAHDI telephony interface (dkms kernel driver)
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. . The dkms package will automatically compile the driver for your current kernel version.