Sandesh Q800A industrial quad-band modem is designed to transmit data and SMS via GPRS/GSM network. Modem can be used to monitor, control and configure any electrical automation devices with Modbus interface. In-build Modbus RTU Device type management support make it easy to install and commission with minimal configuration. Modem can be mounted on DIN or Wall and it works with power supply ranging from 8V to 30V. The serial port feature 15 kV ESD line protection to protect the products from harmful electrical is charge, RS-485 interface is built into the Sandesh Q800a. Build-in micro USB interface make it easy for user connect to PC for configuration and fast Firmware upgrade.