One last question. I also have a USB Wavecom Modem, but it seems I am unable to access it.
Do you know if I need drivers for it? Or I just need to select a different /dev/ device? > Yes, you need that the user you use to run kannel have write > permissions to your devices; dev/ttyS0 in your case. In ubuntu it is > "dialup" group in fedora it "uucp" I think