[Asterisk-Users] [OT] Old Building Needs a New Telephone System

[Kevin P. Fleming]

Tim Donahue wrote:
> First, I will admit that I have not worked with PoE before so I'm asking
> this for my own benifit as well as the OP's benifit.  Doesn't PoE
> require at lest 3 pairs to be availible?  I know that pins 1, 2, 3, and
> 6 get used for ethernet communications and doesn't the power get
> transmitted over pins 4 and 5?  

A PoE-enabled connection needs all four pairs. Two pairs for Tx/Rx, one 
pair for power, one pair for ground.