The Kramer SL-12 31-70900090 is a room controller capable for deployment over customer Ethernet LAN. According to its K−Config configured control program, it controls customer controlled devices such as AV scalers, video displays, audio amplifiers, DVD players, sensors, screens, shades, door locks, and lighting. The room controller controls customer devices via its local bidirectional one RS−485 and four RS−232, four IR, four GPI/O, and eight Relay control connections. Concurrently, the room controller controls IP−enabled devices and remote devices via its Ethernet connection. Multiple Kramer control gateways can be IP−connected for I/O ports extension and remote control of customer devices. Typically serving as the master room controller of the room control system, the SL−12 can be connected to other room auxiliary controllers and control keypads, through its KNET™ connection, for both powering and room control communication.