Great way to power your usb hubs if your pc can not handle it. Some hubs with not work with this setup, so try at your own risk. Lot of people do this with the usb hubs, but I wanted to be able to use the hub without having to have the power attached.
Step 1: What's needed.
1 - usb extender cable
2 - wall phone type solderless jacks.
1 (or more telephone (rj-11) type cables
1 (or more) telephone (rj-11) type extenders.
Wire cutters and or wire strippers.
Continuity tester (i.e. http://www.instructables.com/id/Yet-another-continuity-tester/)