At work I've been asked to strip one end of a wire and attach it to an rj45 cable, which will feed into a connector on our phone system. I want to do some testing here Please could some one show me the wiring layout for 3.5mm audio Jack and explain the purpose of each line. The wire I've stripped is made of two plastic sheaths joined together. Stripping one sheath reveals just the bare conductor (correct term? - copper wire). The other one when stripped has an unsheathed copper wire and a pink sheathed copper wire. My manager tells me only two of the contacts need to be wired so that two far left connectors with RJ-45 lead (with clip facing downward) are in. Any advice would be greatly appreciated?