I agree with Eddie, probably should be a standard associated with which wire carries what. So then even if you screw up you don't brick you stuff.
Ah yes. "Brick". After doing that to a couple of iPhones trying to Jailbreak them, I am intimately familiar with the term.
As far as what Simon Says (see what I did there?) I would love to know WHAT the guy plugged into where. I don't know anything about equipment I don't have, and my Line 6 amps CLEARLY say that the RJ45 is for the shortboard. I have moth the little practice amp and a Spyder III modeling amp head plugged into my 2x12 speaker. That this is SO LOUD I an barely use it at home. I haven't even gone through all the modeling settings yet. 100 bucks from a pawn shop in Los Angeles! Also have a Pocket Pod I got for $30 and shipping from a pawn shop in San Francisco. All those guitar toys!!!
And I am a keyboard and sax player who used to be a guitar player and now can't grip a pick because of arthritis. LOL!! We won't even get into how many guitars I have.