... Module: Industrial Cellular Module Standard and Band: GSM850/900/1800/1900MHz(Optional GPRS modem 3G modem M2M GPRS Modem With RS232 ... /IP stack, supports transparent data transmission, AT Command, RS232/485, remote configuration and control, with embedded Operation System ... System 1. MCU High-powered MCU, 100M 2.Interface RS232/RS485 serial port, rates: 110~230400bits/s Indicator lights: "Power", "ACT ...