... 4.RS232/RS485 IP modem, RS232 modem, GSM IP modem, GPRS data modem, data terminal,GPRS DTU, TCP/IP modem, IP WIRELESS MODEM, SIMCOME MODEM, 3G IP MODEM, EDGE MODEM,gsm ... WDTReporting the status of data transferStandard AT command interfaceSupport common MODEM functionSupport telnet functionSupport remote configure and controlEasy to upgrade firmwareSupport ...