[Wylug-discuss] Technical enlightenment request

[Gary Stainburn]

Hi Anne,

As Graham has alluded to, I think you're confusing two things here.

POE is designed to drive low power (usually) network related devices.  

Example devices are VOIP phone sets, WIFI access points.

I doubt very much that your printer, laptops, NAS device etc. are being 
powered by POE.  Do they not have their own power supplies?

(Usually) POE enabled switches are pretty powerful, so I would not imagine 
that your network of ~ 5 devices will overload it.  It does of course depend 
on the type of work that you do.  If you're in to moving large image or musc 
files to / from your NAS constantly then that may bog it down a bit but 
otherwise you should be fine.

If your work is heavily internet based, that would be my first thing to look 
at if you're having performance issues

Gary

On Tuesday 28 July 2015 23:18:50 Graham Whaley wrote:
> I'm a little confused here - so you are running PoE to power all of
> those devices? - you have some device (a PoE enabled network switch or
> a PoE 'injector' somewhere in your network system) supplying the power
> to the ethernet cables, and the devices thus do not run of normal
> 'mains' power -yes? Either that, or you are actually asking a question
> about mains wiring - not quite clear to me.
> Not being a PoE expert I went and read the wikipedia article - seems
> you can only normally upto 15-25w of power to each device, which feels
> borderline to me for running a laptop for instance.
>
>  Graham
>
> On 28 July 2015 at 17:43, Anne Wilson <cannewilson at googlemail.com> wrote:
> > Seeing the reference to
> > http://www.ebuyer.com/583348-d-link-dgs-1008p-8-port-gigabit-poe-unmanage
> >d-desktop-switch-dgs-1008p-e made me think about PoE.  Am I right in
> > thinking that, since you feed a single line into the powerline, picking
> > it up in various places is akin to picking it up from a switch box?
> >
> > In my office here (a stone building in the garden) I'm using PoE.  There
> > is this laptop, doing most of the work, a small gizmo that feeds into
> > the TP-Link AP, an ethernet connection to my OfficeJet mfp, and the
> > occasional attachment of a further laptop.  Anything of importance is
> > saved to my NAS in the house and regular backups feed to the NAS.  At
> > times I think I'm overloading the system, as things start to slow down.
> >  Coincidence, or real problem?  If I've understood the PoE bit
> > correctly, then putting another switch box would only compound the
> > problem, wouldn't it?
> >
> > Or do I have it completely wrong?
> >
> > Anne
> >
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