The latest source rpm driver supporting the latest kernels is available for download from:
Make certain the rpm, alien, kernel-headers and the libncurses5-devel packages are installed on the system.
Make a symbolic link the bash shell in place of dash (there are problems using dash):
sudo rm /bin/sh
sudo ln -s /bin/bash /bin/sh
Configure the daemon/ports:
The above command configures the Digi unit with IP address 192.168.0.4 and 16 ports to have tty ID's of ttya00 through ttya15.
If errors are seen, the file called typescript residing in the directory where the script command can be used for debugging.