MODEM GSM/GPRS	TMN-50	TMN-1000	TC-18
Spec. Sheet GSM Modem or GPRS Modem	Spec. Sheet SMS Alarm and Control Unit	Spec. Sheet SMS Alarm and Control Unit	Spec. Sheet Low cost Terminal
RS232 interface Uses Vodafone SIM Card Dial in to remote controller	Uses Vodafone SIM Card 4 * Inputs 1 * Output Customised messages	Uses Vodafone SIM Card 8 * Inputs 8 * Outputs Customised messages	Low Power Consumption Low Noise (No Fan) Space Saving