I'm building a patch-board for CAT-5e cables, whereby any pin can be re-wired to any other by a set of jumper cables. This is for testing black-box systems where weird things have been done to Ethernet sockets in order to make it difficult for someone to just walk up and plug in a laptop.
I'm in the PCB design phase, and have the following design in mind:
Here's the design I have in mind:
The board is using 0.254mm traces, and the total length of each trace is no more than 25mm. I've alternated the traces on each side of the board to increase clearance between them, and hopefully the PCB itself should provide a little insulation against EM leakage.
I'd like to know if impedance matching is going to be an issue on a standard 10/100 Ethernet link, across this kind of design. Obviously the outer traces are currently about 50% longer than the middle one.
Any other recommendations on improving the design would also be welcome.