... RS232 modem, GSM IP modem, GPRS data modem, data terminal,GPRS DTU, TCP/IP modem, Support transparent data transfe, ... 1900MHz(optional)Compliant to GSM phase 2/2+GPRS class 10, class 12(optional)Bandwidth85.6KbpsTX powerGSM850/900: <33dBmGSM1800/ ... 3V/1.8V user card interface, 15KV ESD protectionPowerTerminal block interface, reverse-voltage and overvoltage protectionTerminal BlockAntenna Interface SIM ...