Re: [AFMUG] OTDR Recommendations

Tue, 05 Nov 2024 09:16:48 -0800

You can also cold clamp the fiber cable with liquid nitrogen to induce a temperature dependent loss event to pin point your location. No cable cutting needed.
 
 
Jared
 
 
Sent: Thursday, October 31, 2024 at 6:51 PM
From: "Ken Hohhof" <khoh...@kwom.com>
To: "'AnimalFarm Microwave Users Group'" <af@af.afmug.com>
Subject: Re: [AFMUG] OTDR Recommendations

Can you improve the accuracy by testing from both ends?

 

From: AF <af-boun...@af.afmug.com> On Behalf Of ch...@go-mtc.com
Sent: Thursday, October 31, 2024 12:33 PM
To: AnimalFarm Microwave Users Group <af@af.afmug.com>
Subject: Re: [AFMUG] OTDR Recommendations

 

Still, length is not an exact science with OTDRs.  Especially if it is a long shot. 

Every fiber has a different index of refraction and velocity factor.  And these characteristics vary along the entire length of the fiber.

Then there is twist in the tube, wavering routes and slack loops etc.    And there is also timebase accuracy, which varies with temperature...

 

So if you have gopher damage in the desert and the closest hand hole is 10 miles away, you will have to dig and cut several times before you zero in on it. 

 

 

From: Dev

Sent: Thursday, October 31, 2024 10:39 AM

To: AnimalFarm Microwave Users Group

Subject: Re: [AFMUG] OTDR Recommendations

 

We had a $300 OTDR. The only thing it didn’t do was estimate length very well if it worked at all.

 

My friend asked how much money we’d save if we dug up the wrong lady’s yard to replace a fiber that wasn’t broken.

 

Then we bought a Viavi, waited for a show discount. Now we can dig up the right lady’s lawn.


 

On Oct 31, 2024, at 8:14 AM, Josh Luthman <j...@imaginenetworksllc.com> wrote:

 

Metronet :P

 

On Thu, Oct 31, 2024 at 11:12 AM Mike Hammett <af...@ics-il.net> wrote:

Josh, which competitor? I've seen similar things out of MetroNet.



-----
Mike Hammett
Intelligent Computing Solutions

Midwest Internet Exchange

The Brothers WISP


 

From: "Josh Luthman" <j...@imaginenetworksllc.com>
To: "AnimalFarm Microwave Users Group" <af@af.afmug.com>
Sent: Tuesday, October 29, 2024 6:56:31 PM
Subject: Re: [AFMUG] OTDR Recommendations

 

 

 

I know Exfo has units with an optional PON port for connecting to a live on-net fiber and testing. Maybe this is more or less standard anymore, my current OTDR is a bit dated.

On Tuesday, October 29, 2024, Josh Luthman <j...@imaginenetworksllc.com> wrote:
> IDK what you mean by PON features unless you want an inline unit to watch the traffic.  Veex just came out with one that will do that.  I don't see the need, but it is cool.
> We bought the one (or one like) Cassidy linked and then bought this second:
> https://www.amazon.com/gp/product/B0CW3B9ZM8/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
>
> Cassidy - get a super cheap/fast PON meter that just reads the light from the OLT rather than waiting for the OTDR to boot.  Or just clamp and see if there is light - https://www.amazon.com/YEDEMC-Optical-Identifier-800-1700nm-Functions/dp/B09JLL6NPM/
> On Tue, Oct 29, 2024 at 4:45 PM Cassidy B. Larson <c...@infowest.com> wrote:
>>
>> We’ve been getting these smaller OTDR/VFL/OPMs from Amazon for our field techs. This way they can see if there’s a problem with the drop at least. If it’s anything past that, the splicers with the fancier/costlier OTDRs get involved.  Price point is right and it does what they need it to do.
>> https://www.amazon.com/YEDEMC-Mini-Pro-Mulit-Function-5m-60Km-Dynamic/dp/B092LNWZ4Y/
>>
>> -c
>>
>> On Oct 29, 2024, at 2:39 PM, Jason McKemie <j.mcke...@veloxinetbroadband.com> wrote:
>> Does anyone have any recommendations for an OTDR that won't break the bank but is reasonably easy to use? My Exfo just stopped powering up today, so evidently I'm in the market for a new one. The Exfo is about 14 years old, so I assume they've come a little ways since then. I don't need anything for super long distances, mainly just access, PON features are a plus. --
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