Patch cable remote extension
Sold as a pair, these modules connect via ethernet cables to allow for simple connections between large or spread-out cases.
2 RJ45 Available - On the front panel to connect between 2 racks, On the back of the module to create "shortcuts" inside big rack.
it is possible to chain few RackPlumbers to achieve passive mult.
https://youtu.be/RNEUO9He6gA
Available as an assembled Module and as a DIY project.
This Module is currently available.
$40