I haven't found a guide on the web and am wondering if anyone can point me to a how-to or show me the steps. Basically, I'd like to craft something like this: http://www.amazon.com/CableRack-Rollover-Console-Cable-Cisco/dp/B00GN5OHIW
I have a USB connector, Category-5E cabling and RJ45 jacks. I assume there's some converting that has to be done in the middle to convert the USB's four wires to Category-5E's eight wires.
Best Answer
What you are looking at is not just a simple cable, but a USB-to-serial adapter with electronics built in to handle the conversion. It isn't an ethernet cable, and it doesn't require Category-5E. Cisco has had serial-to-serial rollover cables forever, using telephone-grade cable.
If you have a standard Cisco rollover cable, which comes with just about every Cisco device, all you need is a USB-to-serial adapter, and the software which comes with the adapter. This is just those two things combined.