File README.SUSE of Package gnokii-0.6.28cvs.tar.bz2

to avoid need for suid bit, serial ports are opened by resmgr

suppose your user name is "joesix" all you need to do is to issue the  
following two commands: 
# echo "allow modem user=joesix" > /etc/resmgr.conf.d/60-joesix.conf  
# rcresmgr restart

see /usr/share/doc/packages/resmgr/ for more information