A quick google search turned up this:

http://www.wirelesslan.gr/product_info.php?cPath=48&products_id=1062&osCsid=
440557bb417622d46a58ff9007e2a706

POE switching volt to 5V or 6V or 7.5V or 9V or 12V

Looks to be 48V in and two outputs of 5V, 6V, 7.5V, 9V, or 12V.  It would
require a fairly large case at the top side of your tower, but you could run
48V up a single 4 pair ethernet cable to a 3COM NJ200 - then you could run
48V out of the various ports of the NJ200 into these little voltage
regulator devices and then run the regulated 12V power out of these devices
and into your top side equipment.  Theoretically it would work and you would
have a network switch topside all running off of a single 4 pair wire.

NOTE: I wouldn't do this!  I would just run extra pairs to the top.  The
less equipment topside the better.  Too many circuits top-side makes too
much climb time.  Stuff breaks... I think Murphy's law has some sort of
postulate that says stuff at 200ft AGL breaks MORE OFTEN!!!

- Larry 



-----Original Message-----
From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On
Behalf Of Greg Ihnen
Sent: Tuesday, March 16, 2010 12:35 PM
To: WISPA General List
Subject: Re: [WISPA] POE powered POE Splitter with Switch?

Thanks. Those are good but don't quite do it. The specs say the POE is 48v.
I'd like something that you could program the POE out to 12v connected
devices.

Greg
On Mar 16, 2010, at 11:01 AM, Mike Delp wrote:

> 3Com was close with the Network Jack devices.  made to fit in a wall
outlet,
> poe, POE out, and 300 version was managed.  Only four ports out, but
initial
> testing was pretty cool.  It is only 802.3af.
> 
> nj200 is the 10/100 model, and I just googled it and there is now a nj2000
> for Gigabit speeds.
> 
> Thanks
> 
> Mike
> 
> On Tue, Mar 16, 2010 at 7:16 AM, Greg Ihnen <os10ru...@gmail.com> wrote:
> 
>> Does anyone know of or use a POE powered POE splitter/switch combo which
>> could be tower mounted which would allow a single ethernet cable carrying
>> POE (perferrably 48v)  up the tower, and then would pass POE (adjustable
>> voltages) to multiple devices and also act as a switch (preferably
managed)?
>> I'm thinking of something that would let a person run a single Ethernet
up
>> the tower and then connect multiple POE powered devices. It seems like
this
>> is something that would be a big hit. Yes, I Googled it first.
>> 
>> Greg
>> 
>> 
>> 
>>
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