CloudEngine S5731-L series remote units of campus switch are all gigabit Ethernet switch based on the innovative architecture, provide all gigabit data access capabilities; Based on the simplified architecture, functions as a remote unit and works with the central switch to implement simplified network deployment; innovative optical/electrical PoE is supported; the central switches provide more than 1000 m PoE power for remote unit; the switches can be widely used in enterprise offices, education, hotels, and healthcare, helping enterprises build green and low carbon buildings.