[asterisk-users] Slightly OT: SNOM & PoE

[Andrew Latham]

Tim

I have a batch of 30 that it does not affect.  I also have a batch of
12 that it does effect.  I like the SNOM phones and I think that I
just got a batch missing some shielding or other component.  It is
_very_ noticeable when it happens.


Andrew



On 8/2/07, Tim Koehler <digiumlist at googlemail.com> wrote:
> Hi guys,
>
>
>
> one of our German distributors (Allnet) has reasonable PoE switches
> (price/features). They also have a distribution Channel in the US
> (http://www.allnet-usa.com ). They at least work pretty ok in our
> environment.
>
> I could imagine that the power "isn't very clean". Meaning the voltage
> changes, there might be peaks, etc.
> This can also come from the power outlet in the wall, and be given through
> by the PoE switch to the phones. You could try to run the PoE switch with an
> electronical Backup (UPS) which "cleans" the power from the power network.
>
>
> Hi Andrew,
>
>
> the GSM lookup is completly new to us, you're the first one reporting this
> us.
> I just checked myself and let the hardware guys check your comment on the
> GSM phone.
> We weren't able to reproduce the lock up.
> Neither UMTS, nor GSM (1800MHz and 800MHz) had any effect on the phone on my
> desk. Please specify this (used phone, location where you're holding the
> phone?, etc.).
>
>
>
> Regards
>
> Tim
>
>
>  On 8/1/07, Andrew Latham <lathama at lathama.com> wrote:
> > I use on a regular basis the D-Link line, they work.  With the SNOM
> > you will want to set the ignore Ethernet unplug in case the Ethernet
> > switch restarts (like a Netgear 7248 attached to a cheap fiber trans).
> > Keep in mind that holding a GSM phone real close to some of the SNOM
> > phones will cause them to lock up.
> >
> >
> >
> >
> > On 8/1/07, Anthony Cennami <acennami at gmail.com> wrote:
> > > Hello All,
> > >
> > > I apologize for the slightly off-topic question, but I'm sure that the
> > > people best acquainted with the issue would be hanging around here.
> > >
> > > We recently deployed several Linksys POE switches for some smaller
> customers
> > > (10-24 station) and appear to be suffering from intermittent lock-ups of
> the
> > > SNOM phones attached.
> > >
> > > Obviously we are running Asterisk for the gateway, but I was curious if
> > > anybody has experienced similar issues.  Phones will run fine, and then
> > > intermittently (and at different times for different ports) the phones
> will
> > > lockup and require a hard reboot.
> > >
> > > I've read on voip-info that the SNOM phones are apparently sensitive to
> > > lower-end network equipment, presumably with PoE only aggravating the
> > > problem.
> > >
> > > Question is, what are people using today to deploy PoE, and more
> > > importantly, PoE to SNOM phones?
> > >
> > > I believe the model we're working with is the SR224P from Linksys, and
> the
> > > entire model line of SNOM (3XX)
> > >
> > > Could anybody recommend some well-used/tested PoE equipment that you've
> > > found successful in your SNOM envionment?
> > >
> > > Looking for density of 24-ports plus, and ideally some lower end and
> higher
> > > end equipment, to satisfy the needs of the wide variety of customers we
> do
> > > business with?
> > >
> > > Thanks,
> > >
> > > anthony
> > >
> > >
> > > --
> > > Anthony Cennami
> > > _______________________________________________
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> >
> >
> > --
> > /*
> > Andrew Latham
> > LATHAMA (lay-th-ham-eh)
> > lathama at lathama.com
> > lathama at gmail.com
> > */
> >
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>
> --
> ---------------------------------------------------
> snom technology AG
>
> Tim Koehler
> Partner Manager
> tim.koehler at snom.de
> _______________________________________________
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-- 
/*
 Andrew Latham
 LATHAMA (lay-th-ham-eh)
 lathama at lathama.com
 lathama at gmail.com
*/