prepare my server to send sms using a modem

I want my server to send sms using a modem (e.g. MF190 or zte or similar, all of them are socalled hybrid ones ). The server is running ubuntu 10.04 and i can provide ssh and, preferred, teamviewer access. I have all the data needed to send sms, but cannot manage it to get access the modem. You need to set up everything so that I can start a script, e.g. sendsms --number=1234567 --text="Hello dear, ..." No GUI ! Regards, Michael