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Re: [8023-POEP] Endspan on Alt-B?

Steve:
 
Yes, not common, but they do exist.
 
Examples: 
Dell 3448, 3424
Matsushita M24PWR, M12PWR
 
Regards,
Pete Johnson
 
Sifos Technologies
-----Original Message-----
From: owner-stds-802-3-poep@xxxxxxxx [mailto:owner-stds-802-3-poep@xxxxxxxx]On Behalf Of Steve Robbins
Sent: Wednesday, June 07, 2006 9:31 PM
To: STDS-802-3-POEP@xxxxxxxxxxxxxxxxx
Subject: [8023-POEP] Endspan on Alt-B?

Guys,

 

Someone just pointed out to me that an endspan PSE can use Alt-A, Alt-B, or both.  (See paragraph 33.2.1)  I had forgotten about this, assuming endspans were always Alt-A.

 

This would seem to complicate our plans to have endspans and midspans share the load.  Midspans always use Alt-B, so they can share ONLY if the endspan uses Alt-A.

 

Does anyone know of any endspans that actually use Alt-B (the spare pairs)?  If so, please reply.

 

Steve