[cisco-voip] 7960 PoE pinout

[Jon Lewis]

I'd like to roll my own PoE converter for a 7960 phone, but I'm having
trouble finding docs on the cisco PoE pinout.  One reference I found on
CIO says that cisco PoE puts 48v on the signal wires:

 For inline power connections, signal pairs are used to provide inline
 power. Nominally, there is 48 V between the pin pairs (1-2), and pairs
 (3-6) when inline power is active.

Other PoE standards I've seen use the pairs not used by 10/100baseT to
provide power.  If I hook one side of my 48v supply to 1&2 and the other
to 3&6, is there a risk of damaging the swithport (or switch, a 2900XL)
that supplies this ethernet drop?  Which pair gets the + adn which gets
the -?

----------------------------------------------------------------------
 Jon Lewis                   |  I route
 Senior Network Engineer     |  therefore you are
 Atlantic Net                |
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