Follow along and I'll show you what I did to track down the cables from the router/switch/patch panel to their destination.
**Please make sure that all cables that you might be tracing are unplugged because I am not sure if the tester could damage computer hardware, or if the computers could damage the tester.**
**Also use proper safety as you are dealing with electricity (albeit very low voltage) you never know what might have been done to the wires!**
Step 1: Tester
It has a nice visual and audio indicator if you have continuity across a wire (and in my case if you have the wire you're looking for!).