... , RS232 modem, GSM IP modem, GPRS data modem, data terminal,GPRS DTU, TCP/IP modem, Support transparent data transfe, gprs ... and 1 RS485(orRS422) port, 15KV ESD protectionData bits: 5, 6 ,7, 8Stop bits: 1, 1.5, 2Parity: none, even, ... UIMStandard 3V/1.8V user card interface, 15KV ESD protectionPowerTerminal block interface, reverse-voltage and overvoltage protectionTerminal BlockAntenna Interface SIM/ ...