Powerdsine IEEE802.3 Manuale Utente Scaricare il pdf (Pagina 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.

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Powerdsine IEEE802.3 Manuale Utente Pagina 19