[asterisk-users] POE injector

[Paul Hayes]

Noah Miller 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
> 
The midspans that Phihong make are very good.  They support gigabit pass 
through and have very good overload protection.

cheers,
Paul.