[asterisk-users] PoE - IEEE 802.3af

[Mike]

Hi,
 
I'm not clear on how to use Power--over-Ethernet, specifically with Polycom
phones.
 
What I understand, is that by buying the Polycom 501 with the 802.3af cable
bundle, I simply connect my phone, through the Polycom provided "special"
RJ-45 cable, into a PoE capable switch, and voilà!
 
Is this true?  And if so, what happens when the Phone doesn't connect
directly to the switch? (let`s say there is wiring in the wall that goes to
a patch panel, for example.  Do I need to change all the wiring in the
office?)
 
Mike
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