F2103 GPRS MODEM with RS232/RS485 for automotive meter reading 1,GPRS MODEM adopts high-powered RISC CPU 2, ... port F2103 GPRS MODEM(DTU) with RS232/RS485 for automotive meter reading F2103 GPRS MODEM adopts high-powered RISC CPU and ... port, rates: 110~230400bits/s Indicator lights: “Power”, “ACT”, “Online” Antenna interface: standard SMA female interface, 50 ohm SIM/UIM interface ...