I read a lot both here and what was in the manual about using a standard RJ11 cable. I didn't really understand what having the wires switched on each end meant until I test a few phone cables I had and found which one's worked. So I took some pics and thought I would post for the benefit of other newbies like myself!
I know the pic isn't perfect on the left, but if you read it you get the idea. Hope it helps someone out!
Still even if you get a cable that LOOKS right, you really need to test the cable before installing it. I've had a cable that looks correct but didn't work.