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PowerDsine Presentation October 2005 Page 19
www.PowerDsine.com
How to solve the conflict – PD side
Proposed Solution
Effects on PD specifications
– PD operating voltage range: No effect. Remains 37-57V.
– PD classification in 802.3at (including Class 4) should be
mandatory and not optional
– The enhanced classification table will be divided to two parts:
(See details in “An Extended Classification Proposal- Proposal #1, Vancouver BC, Nov. 2005)
Part a: power classes that can work with either 44V or 51V.
Part b: power classes that can work only with 51V minimum at the
PSE.
– This may be documented in the Informative section of the
standard.