... fax machine, 3g ip modem, telecommunication product, sim bank, gsm adapter, simcom gsm/gprs module, data terminal unit, gsm terminalEF2403 TCP ... .6Kbps(DL), 42.8Kbps(UL) Interfacehigh-powered MCU, 100MRS232/RS485 serial port, rates: 110~230400bits/sIndicator lights: “Power”, “ACT”, “Online”Antenna ports ...