The problem was that HylaFax, which runs as the user 'uucp' on CentOS, couldn't open /dev/FS0, because the permissions were wrong. Since I didn't see any way to make FreeSwitch change the permissions, I added one line to the /etc/init.d/freeswitch file: *** 46,51 **** --- 46,52 ---- RETVAL=$? echo [ $RETVAL -eq 0 ] && touch $LOCK_FILE; + (sleep 120; chgrp uucp /dev/FS*; chmod g+r /dev/FS*) & echo return $RETVAL } -- Steve