... pbx, cdma huawei, wireless fax machine, 3g ip modem, telecommunication product, sim bank, gsm adapter, simcom gsm ... temperature: -40~+85ºCHumidity: 95% (unfreezing)Software functionDesign with standard TCP/IP protocol stackAdopt smart online ... reportSupport hardware and software WDTReporting the status of data transferStandard AT command interfaceSupport common MODEM functionSupport telnet ...