Could you explain a little more about your system and what you are trying to implement? Where does LabVIEW fit in your system? Are you asking how to send SMS text messages from LabVIEW to a GSM phone or are you asking how to communicate between LabVIEW and some kind of external GSM device? If it's the latter, then tell us a little more about this GSM device.
E. Sulzer
Applications Engineer
National Instruments