Are the KN-200s that are shipping now have temperature control on the fan
header? (I've got a KN-200 with a fan on it now, and to tell the truth,
the fan doesn't use much power...and haven't had any temp. problems so
far--with a 14vdc supply. But I'd like to replace it for that odd -10 degree
day up there, when the last thing that needs to be happening is more
circulation!) What about this problem with PoE heat? Is this fixed? I'm
looking at a new WIPOP that needs to be PoE.
Norm
----- Original Message -----
From: "Charles Chia Sheng Wu" <cwu@cwlab.net>
To: "Karlnet Mailing List" <karlnet@WISPNotes.com>
Sent: Tuesday, December 16, 2003 8:56 PM
Subject: RE: [Karlnet] Heat Problems Continued - PoE solution for problems
> Hi,
>
> We have a PoE injector/regulator solution that bypasses the ethernet port
> completely
> By putting a voltage regulator at the top (and having user adjustable
> setting to 5v, 9v, & 12v on our PoE solution), we're able to avoid many of
> the heat problems (basically, board is powered via the power jack, and we
> haven't seen any lockup issues w/ it)
> best thing is price...it's $25 / set, and that includes power supply for
100
> m, and voltage regulator splitter w/ 2 power ends (so you can also power
an
> amp, or power 2 boards up top)
>
> Offlist for more info
>
> -Charles
>
> -------------------------------------------
> KarlNet Preferred Channel Partner
> Ask us about our CPE leasing solutions...
> 773.667.4585x334 (o)
> 773.457.0718 (m)
> 773.632.0571 (f)
>
>
> -----Original Message-----
> From: karlnet-bounces@WISPNotes.com
> [mailto:karlnet-bounces@WISPNotes.com]On Behalf Of Bryan
> Sent: Tuesday, December 16, 2003 10:35 PM
> To: Karlnet Mailing List
> Subject: Re: [Karlnet] Heat Problems Continued
>
>
> I'm preparing to buy these - if the temps you reported are in
> farenheight, they won't work for me....
> If in celsius I'll be ok.
> For my info, since I've not purchased yet & don't know what they report
> in, is that F or C ?
>
> Bryan
>
> Michael McDermott wrote:
>
> >
> > I'm aware the KN-100 boards could/do have possible heat problems, but
> > apparently "the heat issue is resolved".
> >
> > Yesterday, a customer reported that 5 of his KN-100 boards failed due
> > to heat. Yesterday the temperature had only reached 35 degrees.
> >
> > 4 of the units were equipped with senao 200mw cards (with heat sinks)
> > in Demarc outdoor enclosures. Ethernet cable lengths were 10-15 meters
> > and 12V1A power supplies where used. Also the customer was using
> > latest revision of the firmware (4.44).
> >
> > 1 of the units was equipped with a 30mw (Orinoco) card in Demarc
> > outdoor enclosure, Ethernet cable length was 10-15 meters and 12V1A
> > power supply. This one also failed in this heat.
> >
> > All of these units failed with an on board temperature of about 59
> > degrees, but the customer also reported that the some of other units
> > did not fail had on board temperatures of 64 degrees. Why do some
> > units fail with an on board temperature at around 59 degrees and
> > others do not?
> >
> > This customer is pro-active as he is using lower voltage power
> > supplies and has applied heat sinks to the cards. What else can we do
> > to solve this problem without the use of fans?
> >
> > What is Karlnet doing to resolve these problems?
> >
> > Thanks.
> >
> > Michael R McDermott BEng (Comp. Eng.), MACS, IEEE
> > Pre-Sales Technical Consultant
> > Veritech Australia Pty Ltd
> > _______________________________________________
> > Karlnet mailing list
> > Karlnet@WISPNotes.com
> > http://lists.wispnotes.com/mailman/listinfo/karlnet
>
>
> _______________________________________________
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>
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