The SL−10 is a master room controller that can operate over Ethernet (LAN) with control ports that include: bidirectional one RS−485, two RS−232, three IR, two GPI/O, and five relay. It controls devices such as scalers, video displays, audio amplifiers, DVD players, sensors, screens, shades, door locks, and lights. Multiple Kramer Ethernet gateways can be used to add remote I/O ports.