Looks like you'll be able to get more information from here:
http://www.poweroverethernet.com/favicon_ico/content/view/full/39/
Power Over Ethernet - technical articles

-Adam

Josh Koffman wrote:

>Thanks for the link. I've seen similar ones. While this may work for
>individual users, 802.3af is a standard that specifies how power
>suppliers and power users can co-exist on the network without damaging
>non 802.3af compliant devices. There is a bunch of stuff about sensing
>resistances...or so I gather. That's why I need more data :)
>
>Josh
>--
>A common mistake that people make when trying to design something
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>        -Douglas Adams
>
>"Rick C." wrote:
>
>
>>This might help:
>>http://www.wireless.org.au/~jhecker/poe/
>>
>>
>
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