[asterisk-users] POE injector

[Al lists]

IEEE802.3af uses same 4 wire as data.
thats what Polycom uses.
the way i'm seeing it we are better off with poe switch(looking at the
price).


On 7/20/07, Noah Miller <noahisaacmiller at gmail.com> wrote:
>
> > I'm looking for 24 or 48 port IEEE802.3af POE injector.
> > Any recommendation?
>
> Yes.  For the price of one of those multi-port injectors, you can come
> close to the price of a new Netgear or 3Com PoE switch.  The injectors
> typically add power to the unused pairs (mode B PoE).  This means you
> can't use them on anything better than fastethernet.  When switches do
> PoE natively, they put the power on the data carrying pairs (mode A
> PoE), so they can do gigabit ethernet.  I think PowerDsine makes a PoE
> injector that uses mode A, and so it can do gigabit ethernet.
>
>
> - Noah
>
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