[Tfug] Yet another poser

[Bexley Hall]

--- johngalt1 <johngalt1 at uswest.net> wrote:

> ----- Original Message ----- 
> From: "Bexley Hall" <>
> To: "Tucson Free Unix Group" <tfug at tfug.org>
> Sent: Monday, September 17, 2007 5:02 PM
> Subject: Re: [Tfug] Yet another poser
> 
> > --- jblais <> wrote:
> >
> >> > Are you talking about POE (Power over
> Ethernet)?
> >> This is a standard,
> >> > IEEE 802.3af, that specifies how switches and
> >> patch panels can provide
> >> > power to end devices such a WAP's, VOIP phones,
> >> network cameras, etc.
> >> >
> >> > Usually they use two pairs of the 4 pair cat 5e
> or
> >> 6 cable to provide
> >> > the power to the end devices.
> >> >
> >> > George Cohn
> >>
> >> Yes -
> >>
> >> If you want a crossover for the signal, you don't
> >> want to cross it with the
> >> power --- or make the motor run backwards -- or
> make
> >> the camera into a
> >> projector (for about a millisecond anyway  :-).
> >
> > Or *interrupt* the power (i.e. by not including
> the
> > conductors to carry it)
> 
> Unless someone can explain a real world application
> of a 
> crossover cable using POE, I call BS. This sounds
> way too hypothetical.

I think network devices tend to be boringly
conformant.
As such, I can't imagine many different "pinouts" of
an RJ45.  Unlike the DB25 shell which was bastardized
in *countless* new and exotic ways  :-(

> Let's see you could connect two POE devices together
> and 
> perhaps they would power each other by
> anti-potential. in 
> the presence of a warp field.
> 
> Alternatively, you could hook up two POE switches or
> power 
> inserters together and they would be powered  by
> their own 
> power supply.



       
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