Em 14/4/2010 10:10, M. Adam Davis escreveu:
> PoE negotiation can be simplified to a few components.  Although I
> imagine that PoE chips are cheaper now than when I designed that
> solution.  I don't recall all the details, but it involved two zeners,
> a transistor, and a few passives.  I think the tradeoff was that it
> only requested the full power - requesting power for smaller loads was
> slightly more complicated.
>
> -Adam
>   =



The only problem of requesting full power (class 0, from 0.44W to
12.95W) is that the switch won't detect whether the equipment is
consuming more or less than it should (unless it consumes more than the
maximum 12.95W).

To me, the classification is just a nice protection feature, but not a must.


Regards,

Isaac

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