dahdi-dkms 1:2.11.1~dfsg-1ubuntu6.2 (armhf binary) in ubuntu focal

 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.