RackPlumber is Patch cable remote extension
Pair of RackPlumber connected via ethernet cables to allow for simple connections between large or spread-out cases.
2 connectors are available - On the front panel to connect between 2 racks and on the back of the module to create "shortcuts" inside big rack.
It is possible to chain few RackPlumbers to achieve passive mult. 
Jack LEDs** monitor if there is signal in each input, those leds bypassed when patch plugged in to prevent voltage drop.
 
*Included in the package is a 1.5 meter long network cable
** The color of the Jack LEDs may be different than in the picture