[SI-LIST] Re: Home-brewed Power-Over-Ethernet? OT?

Hi Steve,

I have seen this on Voip phones and similar  devices....
The relevant standard for this is IEEE 802.3af.

Following is link to a company that makes this kind of stuff.....
http://www.red-hawk.com/products/copper/network/network_product.htm#power
<http://www.red-hawk.com/products/copper/network/network_product.htm#power> 

For home brew applications - you should be OK

Anurag Gupta


                -----Original Message-----
                From: si-list-bounce@xxxxxxxxxxxxx@ROCKWELLCOLLINS On Behalf
Of "Steven Kan" <steven@xxxxxxxxxxxxxxxxxxxx>
                Sent: Thursday, November 21, 2002 9:13 AM
                To: SI-List
                Subject: [SI-LIST] Home-brewed Power-Over-Ethernet? OT?


                I use an Apple Airport Base Station (802.11b access point)
in my home, and I
                want to position it more centrally. In order to mount it on
the ceiling
                where I want it, I'll have to run Ethernet from the hub and
run power from
                the wall.

                Can I run DC over the unused pairs of the Ethernet cable? Or
would the noise
                from the switching adapter cause problems? The adapter is a
pretty
                generic-looking wall-wart, and cable would be unshielded,
solid-core CAT5.
                The Ethernet is slow Ethernet (10 Mbps), and I'd be running
it about 30
                feet.

                Ethernet uses two of the four pairs in the CAT5, and I could
wire the
                remaining pairs in whatever way would be best. Any
suggestions? Thanks!
                --
                Steven Kan
                Pulse Research Lab
                The Quickest Way To Go Fast
                (310) 515-5330
                mailto:steven@xxxxxxxxxxxxxxxxxxxx
                http://www.pulseresearchlab.com


        
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