The FC-21ETH 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 one RS-232 or RS-485 controllable device, such as an AV scaler, video display, and audio amplifier. 1 RS-485 or RS-232 Selectable Bidirectional Control Port - Controls a device via bi-directional serial control protocols. 1 Ethernet Control Port - Remote protocol-based control port. Built-in Web Pages - Remote browser-based control and support. Simultaneous IP Control Communication - With up to 40 IP control clients. Mini USB Port - For firmware upgrades and local technical services. Easy Installation - Plug & play IP auto-setup deployment for simple and cost-reducing installation.