A multiplexer (Mux) is a device that takes multiple video sources and allows them to be viewed on one monitor. Typically they come in four, nine, and 16 position units. By using a multiplexer, the need for multiple monitors is eliminated as the Mux is capable of displaying multiple camera shots onto one monitor.

The multiplexer is typically connected to a VCR for archiving. Nowadays, the DVR will accomplish the viewing and recording functions, and the Mux has been relegated for use when more than 4 pictures need to be displayed on one screen. If your having trouble selecting the right multiplexer for you, then please call us at (800) 572-3390 or visit us at the CCTVhelp.com forum for support