DCCL stands for "Digital Command Control Layout," a system used primarily in model railroading. It allows for the digital control of trains and accessories on a layout, enabling multiple trains to operate independently on the same track. This technology enhances the realism and complexity of model train setups. The DCC system consists of a central command station that sends digital signals to locomotives equipped with decoders. These decoders interpret the signals, allowing for precise control over speed, direction, and lighting. DCC is widely used by hobbyists and is compatible with various scales, including HO scale and N scale models.