... IP modem, RS232 modem, GSM IP modem, GPRS data modem, data terminal,GPRS DTU, TCP/IP modem, Support ... VPDNProduct Specification Cellular SpecificationItemContentCellular ModuleIndustrial cellular moduleStandard and BandEGSM900/GSM1800MHz, GSM850/900/1800/1900MHz ... ESD protectionPowerTerminal block interface, reverse-voltage and overvoltage protectionTerminal BlockAntenna Interface SIM/UIM PortPower ...