The Optical Multiplex System is designed for connecting a portable device over preinstalled lines to the Stage Tec LWC system (for example, a portable NEXUS Base Device to the NEXUS audio network). Similarly, the multiplexer can be used for placing AURUS slave consoles in varying locations. The OMUX optical multiplexer integrates four completely separate units, each managing four duplex optical lines with inputs and outputs. It automatically changes to the currently established connection.