=Adopts the industrial module WAVECOM Q2438J with the external aluminium casing. =Heartbeat detection and automatic watchdog reset. =Data transmission of dial-up networking and message etc. by connecting to the industrial computer and PC. =CDMA frequency 800/1900MHZ =FCC/STAR and CDG 1/2&3 standard =Data terminal is online at any time =MODEM activated =Tone communication and dial control =Sending SMS via PC =RJ45 interface =Dual tone multi-frequency(DTMF) =CDMA 2000 1X =Coding: CS1-CS4 =Wireless interface: 50Ω/SMA =SIM Card 3V =Tone frequency =Working temperature: -35~70°C =Humidity: 90% no condensation