Look in SAX menus. Sax helps configure networks,wireless,internet,modem, and makes a mean grilled cheese sandwich(LOL). If Suse still has a manual or setup guide that will help too. You have to setup the modem with SAX then setup the connection to your provider(and your provider issued username and pw) with SAX.
Look for kppp or wvdial or similar program in KDE menu too. Setup/configuration may be a little more involved if you are using modem on a network. Good luck
. Ask again if you still have trouble.