... alarm (optional)>>Configuration by PC software via RS232 COM port.>>Based on GSM Quad-Band 850/900/1800/1900MHz Network ... 3V SIM Card>>Antenna : 50 Ω SMA Antenna interface>>Serial : RS-232C, Default communication parameter 9600,n,8,0,1>>Temperature ... SMS Alarm, GSM SMS Controller, GSM Home Automation system, Industrial Remote Controller, GPRS RTU Data Logger, GSM Telemetry, Temperature Measurement ...