[asterisk-users] PoE - IEEE 802.3af

[Mike]

Thanks for all the replies, this definitely helps me!

Mike 

-----Original Message-----
From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Noah Miller
Sent: Wednesday, March 28, 2007 12:52
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: Re: [asterisk-users] PoE - IEEE 802.3af

Hi Mike -

> You don't need to change any wiring.  Just be sure that the LAN wiring 
> terminates at a PoE LAN switch (PoE would not be passed through an 
> intermediate switch).

One little caveat:  Depending on the PoE mode, you may need to use all four
pairs of the Cat 5 cable of your network wiring.  I'm not sure which mode
the Polycom PoE cables prefer, but Mode A PoE uses the same two pairs (1-2,
3-6) as 100BASE-TX Ethernet, while Mode B PoE uses the other two pairs (4-5,
7-8).  Most good network wiring will use all four pairs, but some wiring
installations will only use two pairs, so it's probably a good idea to just
double-check that yours uses all four pairs.

- Noah
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