DCGJ-1A RF is Smart Gateway/data collector that is designed based on advances technology for vendor independent Smart Metering purpose. DCGJ-1A RF acting as a gateway between metering devices from different vendor and AMI system, DCGJ-1A using Radio frequency (RF) for downlink communication to metering device and 2G/3G communication for uplink to AMI system. DCGJ-1A also can create daisy chain RF media efficiently for Uplink communication (up to 7 nodes and each nodes support 800 Smart meters) and last node acting as gateway to AMI system.