The FC−22ETH is an Ethernet control gateway, capable of plug and play deployment over customer Ethernet LAN for remote control of customer controlled devices via bidirectional RS−232 or RS−485 serial control connections. Multiple control clients can be IP−connected to the FC−22ETH control gateway for concurrent control of two RS−232 or RS−485 controllable devices, such as AV scalers, video displays, and audio amplifiers.