I dont think he is trying to say that all phones were designed to take power from the 2nd pair he is saying that you could put the transformer that some phones have and locate the transformer remotely and send the power over the blk\yel pair and terminate the plug you cut off the transformer onto that pair and you have eliminated the unsightly "wall wart" wire strung between your wall mounted phone and the nearest electrical outlet. [Linked Image] Now this makes me thing about voltage drop across the run how long of a run can you have without having to worry about it affecting the operation of the set?