Monroe Electronics’ Models provides four (4) independent balanced stereo audio (197A) or balanced stereo audio and video/RF (switches in a single 1 RU frame. Each of the four independent relay channels contains a 2 x 1 (A/B) balanced stereo audio relay switch and a single-pole double-throw dry contact relay. The Model 197AV also includes a 2 x 1 (A/B) video/RF switch with flat frequency response from DC to 1GHz. Each independent relay channel is controllable by individual contact closures pulled to ground or a TCP/IP (Ethernet) LAN interface enabling each channel to be controlled locally or remotely over any TCP/IP network. Using local General Purpose Input devices such as a Monroe Electronics Timer or host of other similar DEVICES the it can switch program audio/video to alternate channels for blackout switching, program isolation, or multichannel EAS program switching.<br>Over a network connection a Monroe One-Net™ or Digital Alert Systems DASDEC™ can directly control EAS audio and other switching devices by each relay channel. Network settings are easy using any standard web browser and the built-in web server configuration page. No special software or cables are necessary. It is conveniently powered by a single wall-mounted power supply (included). A secondary (diode-isolated) power input is provided to accommodate an optional redundant wall-mounted power supply