DCGJ-1B RF is GSM/GPRS Smart Gateway/data collector that is designed based on advances technology for vendor independent Smart Metering purpose. DCGJ-1B acting as a gateway between metering devices from different vendor and AMI system, DCGJ-1B using RS485/RS232/CLO for downlink communication to metering device and 2G/3G communication for uplink to AMI system.