Re: [8023-POEP] Fwd: A timely article
Dan-
Thank you for so eloquently speaking to (and reenforcing) precisely my
point-of-view.
Geoff
At 09:44 AM 11/9/2006 , Dove, Dan wrote:
>Did I see a soapbox standing idle?
>
>I actually read (misread?) Geoff's reference to timliness a bit
>different.
>
>Here we are in a world that is growing more and more sensitive to energy
>waste, and rather than working on a way to improve efficiency, we are
>simply putting out more power at a lower efficiency.
>
>Sending 50V through wires that were intended for low-power
>communications rather than high-power distribution is lossy.
>
>The current paradigm, taking AC power at 120/240VAC and converting it to
>50VDC with an efficiency hit, then running it through a distibution
>network inside a switch (lossy again) then switching it through a FET
>(lossy again) then running it through UTP (lossy again) then a DC/DC
>converter (lossy again) seems to be going backwards.
>
>I think that PoE is a great technology for low-power devices that are
>hard to wire up, but makes little sense for devices that are easily
>attached to a wall outlet (laptop?). Rather than driving toward higher
>and higher PoE power, we should be driving toward lower and lower
>powered PDs... But that is not a standards issue, that is a product
>design issue.
>
>All that said, I am not trying to be negative here... But I do have my
>reservations about just how much power we should be stuffing down these
>data lines.
>
>Dan
>
>
>------------ Previous Message Below ------------
>
>-----Original Message-----
>From: owner-stds-802-3-poep@xxxxxxxx
>[mailto:owner-stds-802-3-poep@xxxxxxxx] On Behalf Of Charles Palmer
>Sent: Thursday, November 09, 2006 8:01 AM
>To: STDS-802-3-POEP@xxxxxxxxxxxxxxxxx
>Subject: Re: [8023-POEP] Fwd: A timely article
>
>Team - just my thoughts:
>
>Anything you can do to minimise the standby state power consumption
>(both ends) could represent many MWhr or GWhr over the years...
>
>And as for the power loss in those PD bridge rectifiers...
>
>This is big news in the UK at present:
>http://news.bbc.co.uk/2/hi/business/6096084.stm
>
>And: European legislation is on the way:
>http://ec.europa.eu/enterprise/eco_design/index_en.htm
>
>Regards - Charles Palmer
>
>Geoff Thompson wrote:
> > ...for our group too.
> >
> >
> >> Subject: A timely article
> >> To: <eee@xxxxxxxxxxxxxxx>
> >>
> >> http://www.businessweek.com/globalbiz/content/nov2006/gb20061107_4475
> >> 69.htm
> >> ?chan=tc&campaign_id=rss_tech
> >
> >