The following script can be used to start the soundmodem service.
#!/bin/sh # required for using a USB Sound Card as a TNC /usr/bin/screen -S sm0 -m -d /usr/local/sbin/soundmodem sleep 2 route add -net 188.8.131.52 netmask 255.0.0.0 dev sm0
This command will run the soundmodem service in a detached 'screen' session for easy backgrounding. To open access to the screen session issue the command 'screen -r' (or screen -ls to find out what the name of the screen session is).
It is not a requirement to run soundmodem in a screen so you can just as easily background it with an empersand.