GSM Alarm Units: Alarm units are dedicated for the supervision of different kind of objects as well as for telemetry applications. Transmission of the event messages is by SMS. So the user could react immediatly to this event. Also it is possible to start an action at the application only by one SMS! Alarm units - overview and comparison table
	GSM Modems: Modem are used for the wireless transmission of data from SPS or other applications which have the need for data transmission but not the surrounding conditions. So it is possible to read out meassurements and other data or start a software upgrade to the target application.