The ARCS Full-2way system is a host-free architecture that utilizes full-2way twisted pair communication lines to seamlessly connect system control signals. It offers various solutions, ranging from small to large Full-2way control systems and even smart integrated control, to meet diverse requirements. The system adopts a modular stacking design, making it simple in structure, easy to construct, and flexibly expandable. The design of the ARCS system is highly flexible, capable of effectively addressing control needs of different scales and complexities, making it an ideal choice for modern building automation and intelligent control.