... GSM/GPRS modem 2.Based on Cinterion module MC37I 3.900/1800 MHz 4.internet, SMS, data WIRELESS USB MODEM,GPRS ... , RS232 WIRELESS GSM/GPRS MODEM, SMS GSM MODEM, huawei gsm modem,, sms module, gsm modem at command, wavecom wireless modem, sim card ... class 10Compliant to GSM phase 2/2+Support DTMFSupport SMS and CSD functionStandard AT command interface InterfaceRS232 serial port, rates: 110~230400bits/ ...