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

[Kevin P. Fleming]

Paul Rodan wrote:
> It actually uses 2 wires for positive and 2 wires for ground/negative? So
> it's combing 2 wires (instead of 1) to deliver more power? 

I believe so, although apparently there is a configuration where the 
power is present on the data wires instead... I've never seen that though.

> Which 2 are positive and which 2 are negative/ground? 

I do not know for sure... I'm looking at a page that says 4/5 are 
positive, and 7/8 are negative. It must be correct, because it's a page 
on how to build your own injectors/splitters :-)

http://www.nycwireless.net/poe/