PowerDsine IEEE802.3 - Manual (Page 19)

PowerDsine Presentation October 2005 Page 19
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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.