Is our theory that JDSU builds for the -40 temp and FS adds a resistor
in just the right place?
On 10/15/2020 3:17 PM, ch...@wbmfg.com wrote:
Was it Trango... yeah I think it was Trango that had a heater for some
of the components on their SMs....
That is one way around it.
*From:* Adam Moffett
*Sent:* Thursday, October 15, 2020 1:12 PM
*To:* af@af.afmug.com
*Subject:* Re: [AFMUG] Cold-weather Ethernet isolation (electrical /
ground)
Interesting. The JDSU industrial temp SFP's are like $200+
Makes me wonder if one of them is robbing me or is the other one
bullshitting me.
On 10/15/2020 3:07 PM, Ken Hohhof wrote:
FS sells a bazillion different SFPs. What is the spec temp range on
the ones you got?
Someone else pointed me to these:
https://www.fs.com/products/12622.html
<https://www.fs.com/products/12622.html>
-30 is pretty cold, not sure if that’s F or C. Of course at -40
they’re the same. You’d expect if you have them plugged into a switch
there would be some heating and the SFP wouldn’t be as cold as the
outdoor temp.
*From:* AF <af-boun...@af.afmug.com> *On Behalf Of *ch...@wbmfg.com
*Sent:* Thursday, October 15, 2020 12:49 PM
*To:* af@af.afmug.com
*Subject:* Re: [AFMUG] Cold-weather Ethernet isolation (electrical /
ground)
When I was designing for Carlson, we discovered cold is always the
enemy, not heat.
*From:*Bill Prince
*Sent:*Thursday, October 15, 2020 11:45 AM
*To:*af@af.afmug.com <mailto:af@af.afmug.com>
*Subject:*Re: [AFMUG] Cold-weather Ethernet isolation (electrical /
ground)
Run fiber. Goes farther, does not conduct.
bp
<part15sbs{at}gmail{dot}com>
On 10/15/2020 10:12 AM, Colin Stanners wrote:
We have a rural tower site where the owner has a few houses on
the property, they ran conduit and cat5e between the houses and
the tower so the houses could get Internet access.
But.... with the size of the property and the tower being a big
metal structure, that caused some voltage / ground imbalances
that fried gear at the houses after storms, I believe even
through surge supressors (hich are made to protect against single
high-voltage direct strikes).
We put in some electrical isolation using copper-fiber-copper
converters / switches at the tower, those worked until the
winter: when it got to -30 outside the FiberStore SFPs were unhappy.
Does anyone have good cold-weather solutions? Or were we just
unlucky with those SFPs and should try something else in the cold?
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