Excavators are pretty good at inducing loss, and you don’t have to run around looking for cold things.
> On Nov 5, 2024, at 9:54 AM, fiberrun--- via AF <af@af.afmug.com> wrote: > > I don't know if dry ice is cold enough to induce a loss event. Dry ice is > barely colder than the normal operating temperature of the cable. Liquid > nitrogen is significantly colder and even so only induces a 0.2 dB loss event. > > There is always risk of thermal stress with such low temperatures, but the > clamping tool is supposed to help with that. > > > Jared > > Sent: Tuesday, November 05, 2024 > From: ch...@go-mtc.com > To: af@af.afmug.com > Cc: fiber...@mail.com > Subject: Re: [AFMUG] OTDR Recommendations > Interesting. Have never heard of that. Are there dangers of the plastic > cracking etc? > Can you do it with dry ice? Much easier to get. > > > From: fiberrun--- via AF <> > Sent: Tuesday, November 5, 2024 10:15 AM > To: af@af.afmug.com <> > Cc: fiber...@mail.com <> > Subject: Re: [AFMUG] OTDR Recommendations > > 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 <http://www.ics-il.com/> > > Midwest Internet Exchange > > The Brothers WISP <https://www.facebook.com/ICSIL> > > > > > 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 <https://www.facebook.com/ICSIL> > I thought the same thing. I had to cancel their service after just a week or > two because streaming was absolutely a joke (looked to me like their peering > was full, couldn't get any kind of capacity beyond their network). They left > this convenient wall plate with an APC bulkhead just sitting here... > <https://www.facebook.com/ICSIL> > > On Tue, Oct 29, 2024 at 5:29 PM <ch...@go-mtc.com> wrote: > <https://www.facebook.com/ICSIL> > I have always wanted to connect a source of upstream light to my connection > at home. (Served by a competitor). Wonder how long it would take to > troubleshoot. Especially if I made it randomly intermittent and on a timer. > Perhaps during the first minute of the superbowl or something...? > <wlEmoticon-winkingsmile[1].png> <https://www.facebook.com/ICSIL> > > > > From: Jason McKemie <https://www.facebook.com/ICSIL> > Sent: Tuesday, October 29, 2024 3:05 PM <https://www.facebook.com/ICSIL> > To: AnimalFarm Microwave Users Group <https://www.facebook.com/ICSIL> > Subject: Re: [AFMUG] OTDR Recommendations <https://www.facebook.com/ICSIL> > > 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. -- > >> 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 > > <https://www.facebook.com/ICSIL> > > -- > AF mailing list > AF@af.afmug.com > http://af.afmug.com/mailman/listinfo/af_af.afmug.com > <https://www.facebook.com/ICSIL> > > -- > AF mailing list > AF@af.afmug.com > http://af.afmug.com/mailman/listinfo/af_af.afmug.com > <https://www.facebook.com/ICSIL> > > -- > AF mailing list > AF@af.afmug.com > http://af.afmug.com/mailman/listinfo/af_af.afmug.com > <https://www.facebook.com/ICSIL> > > -- > AF mailing list > AF@af.afmug.com > http://af.afmug.com/mailman/listinfo/af_af.afmug.com > <https://www.facebook.com/ICSIL> > -- > AF mailing list > AF@af.afmug.com > http://af.afmug.com/mailman/listinfo/af_af.afmug.com > <https://www.facebook.com/ICSIL> > > > -- > AF mailing list > AF@af.afmug.com > http://af.afmug.com/mailman/listinfo/af_af.afmug.com > <https://www.facebook.com/ICSIL>-- 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
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