Doug Fleenor Design makes a series of selector switches specifically designed to switch DMX512 signals.  Originally designed to switch between primary and backup consoles, these switches are often used to select from two (or more) input locations.  Model SW4 switches four DMX512 universes (four A inputs, four B inputs, four outputs).  Doug Fleenor Design Switch Boxes consist of a high reliability switch (rocker or rotary) wired to Neutrik five pin gold plated XLR style connectors (three pin or terminal block optional).  The units are housed in metal enclosures of appropriate size and are rack mountable (with optional rack ears).  The standard units switch the Data+ and Data- lines.  

Note: Professionally maintained and teched prior to shipment.