Re: [AFMUG] Cold-weather Ethernet isolation (electrical / ground)

[Bill Prince]

You can teach your car which is which if you use the magic decoder process. It's a PITA, but it works.

bp
<part15sbs{at}gmail{dot}com>

On 10/15/2020 2:22 PM, Ken Hohhof wrote:

And you used to have to pay the car dealer to reprogram your TPMS system if you replaced a sensor.  Then someone cracked the code and all the tire dealers will do it for free or you can buy a gizmo to do it yourself.

 

From: AF <af-boun...@af.afmug.com> On Behalf Of Colin Stanners
Sent: Thursday, October 15, 2020 3:52 PM
To: AnimalFarm Microwave Users Group <af@af.afmug.com>
Subject: Re: [AFMUG] Cold-weather Ethernet isolation (electrical / ground)

 

And an official Cisco SFP-10G-LR  10Gbit SFP+ 1310nm 10km  is $3000 while the FS equivalent is $30 CDN. Fun market.

 

 

On Thu, Oct 15, 2020 at 2:13 PM Adam Moffett <dmmoff...@gmail.com> wrote:

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

 

-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

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?

 

 

 

---

--
AF mailing list
AF@af.afmug.com
http://af.afmug.com/mailman/listinfo/af_af.afmug.com

 

--
AF mailing list
AF@af.afmug.com
http://af.afmug.com/mailman/listinfo/af_af.afmug.com

-- 
AF mailing list
AF@af.afmug.com
http://af.afmug.com/mailman/listinfo/af_af.afmug.com