People, I've sitting back whatching this thread drift off topic and hinging on what some may feel is boarder line flaming.
I think that Peter Dow's original question has been answered.
If you want to argue the finer points of how and why jacks are wired in the way that they are then take it to the cabling catagory.
I'm trusting I won't have to start PMing everyone and lock this thread down.
Thanks to all who have responded to Mr Dow's original question.
If you feel the need to discuss install or fitting procedures, jack pinouts, plonkers or the price of tea in china please do so via PM or email or start a thread in the "phone booth". :shrug:
let this post RIP, Thank you.
MrG