nanog mailing list archives

Re: POE bump-in-the-wire conversion


From: "Robert E. Seastrom" <rs () seastrom com>
Date: Fri, 31 Dec 2010 12:49:19 -0500


I was aware of this device (being a big Ubiquiti fan), but have yet to
find anyone who has direct experience with using them on a 3524-PWR.

Have you actually tried this (on a 3524-PWR, not a 3550 or anything
later-but-pre-standard)?  The equipment will be quite happy with
16v...

-r

Philip Dorr <tagno25 () gmail com> writes:

The Ubuquti Instant 802.3af seems to do what you want (as long as the
equipment can handle 16v)

http://ubnt.com/8023af
http://ubnt.com/downloads/instant8023af.pdf

On Fri, Dec 31, 2010 at 9:00 AM, Robert E. Seastrom <rs () seastrom com> wrote:

Perhaps someone from this august list can offer a clue here.

Have:  Cisco 3524-PWR  (paleo-POE, pre-802.3af Cisco standard).

It runs the 7960Gs great.

Have:  Wireless AP stuff that wants 12v on the unused pairs for
passive POE.  48v will let the magic smoke out.

Might buy:  phone that does 802.3af

Want to run these with the 3524-PWR.

I can't imagine that nobody makes a bump-in-the-wire converter for
this application, but haven't been able to find anything other than
802.3af to the passive POE use case.

Anyone got a pointer for me?

Thanks,

-r





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