You were mixing imperial and metric years.
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bp
part15sbs{at}gmail{dot}comOn Fri, Aug 30, 2024 at 10:36 AM Shayne Lebrun <sleb...@lakelandnetworks.com> wrote: > You’re right, excuse me, 1966, which was 58 years ago, and my poor brain > got the two numbers mixed up. > > > > *Shayne Lebrun * > > Senior Systems Analyst > > [image: Logo Description automatically generated] > > Support: supp...@lakelandnetworks.com 705-640-0556 | TF: 844-444-4249 > > Direct: sleb...@lakelandnetworks.com 705-646-1846 x583 | > https://www.lakelandnetworks.com/faqs/ <http://www.lakelandnetworks.com/> > > Lakeland Networks <http://www.lakelandnetworks.com/> > > > > *From:* AF <af-boun...@af.afmug.com> *On Behalf Of *ch...@go-mtc.com > *Sent:* Friday, August 30, 2024 11:05 AM > *To:* AnimalFarm Microwave Users Group <af@af.afmug.com> > *Subject:* Re: [AFMUG] fiber patch cables > > > > ' > > > > EXTERNAL Email Disclaimer > > CAUTION: This email originated from outside the organization. Exercise > caution when clicking on links or opening attachments even if you recognize > the sender. > > I am surprised that it even existed in 1958 as that program was not even > announced until the 1960s. > > > > *From:* Shayne Lebrun > > *Sent:* Friday, August 30, 2024 8:54 AM > > *To:* AnimalFarm Microwave Users Group > > *Subject:* Re: [AFMUG] fiber patch cables > > > > Say, did you know that the Apollo Guidance Computer, from the first > iteration in 1958, did all of it’s internal calculations in metric, then > converted to imperial for display to the astronauts? > > > > So yes, America went to the Moon on metric. > > > > *Shayne Lebrun * > > Senior Systems Analyst > > [image: Logo Description automatically generated] > > Support: supp...@lakelandnetworks.com 705-640-0556 | TF: 844-444-4249 > > Direct: sleb...@lakelandnetworks.com 705-646-1846 x583 | > https://www.lakelandnetworks.com/faqs/ <http://www.lakelandnetworks.com/> > > Lakeland Networks <http://www.lakelandnetworks.com/> > > > > *From:* AF <af-boun...@af.afmug.com> *On Behalf Of *Josh Luthman > *Sent:* Wednesday, August 28, 2024 9:12 AM > *To:* AnimalFarm Microwave Users Group <af@af.afmug.com> > *Subject:* Re: [AFMUG] fiber patch cables > > > > ' > > > > EXTERNAL Email Disclaimer > > CAUTION: This email originated from outside the organization. Exercise > caution when clicking on links or opening attachments even if you recognize > the sender. > > Totally missed that last part XD > > There are two kinds of countries: those that use the metric system and > those that have been the moon. > > > > On Wed, Aug 28, 2024 at 8:52 AM Ken Hohhof <khoh...@kwom.com> wrote: > > Because he used metric, or because he spelled it metre? > > ---- Original Message ---- > From: "Josh Luthman" > Sent: 8/28/2024 7:40:18 AM > To: "AnimalFarm Microwave Users Group" > Subject: Re: [AFMUG] fiber patch cables > > OK Euro guy...let the American's get the job done. > > > > On Tue, Aug 27, 2024 at 11:59?PM Ryan Ray <ryan...@gmail.com> wrote: > > We use EXFO otdr's on some spans that are 160km and we can get it down to > the metre. > > > > On Tue, Aug 27, 2024 at 7:07?PM Josh Luthman <j...@imaginenetworksllc.com> > wrote: > > Don't you document where your splices are? If you see your splices every > 33k and see it's broken 1 mile from the last splice it should be pretty > obvious, no? > > > > On Tue, Aug 27, 2024 at 6:26?PM <ch...@go-mtc.com> wrote: > > Magical device called a fusion splicer. Our reels were typically 33,000’ > > > > > > *From:* Josh Luthman > > *Sent:* Tuesday, August 27, 2024 3:51 PM > > *To:* AnimalFarm Microwave Users Group > > *Subject:* Re: [AFMUG] fiber patch cables > > > > I don't see how you have a 50 mile span. Even if you get 80k reels that's > 15 miles. > > > > On Tue, Aug 27, 2024 at 5:19?PM <ch...@go-mtc.com> wrote: > > When you have spans up to 50-75 miles at times, you have to use longer > high power pulses. There is a lot of variability in velocity of > propagation, earth temperature, splice slack loops, fiber twist. 1 mile > error over 50 miles is only 2%. You can easily be off by several thousand > feet. You can’t just go dig. You have to go to the closest splice point > and test again, even then if you it show the fault 2000 feet away and you > dig at 2000 feet you may be off by 20 feet or more. I have been doing this > for decades. Takes lots of digging to actually find it. > > > > *From:* Josh Luthman > > *Sent:* Tuesday, August 27, 2024 3:01 PM > > *To:* AnimalFarm Microwave Users Group > > *Subject:* Re: [AFMUG] fiber patch cables > > > > A mile?! IDK how that's possible. Every time we turn a new splitter on > the sequentials and OTDR are within a few feet - we lose a couple of feet > in butt splices and our sequentials end up wrong. Every new reel gets > tested on delivery and it's right on. > > > > When we had a broken fiber (ants) it was right on the case. When we had a > broken fiber (ribbon got knicked with installation) it was between two > cases. > > > > On Tue, Aug 27, 2024 at 3:48?PM <ch...@go-mtc.com> wrote: > > Wow, sometimes looking for gopher damager over 20 miles I have been off a > mile. > > > > > > > > *From:* Josh Luthman > > *Sent:* Tuesday, August 27, 2024 1:30 PM > > *To:* AnimalFarm Microwave Users Group > > *Subject:* Re: [AFMUG] fiber patch cables > > > > So far every time we've used the OTDR it's been accurate within 1 foot. > > > > On Tue, Aug 27, 2024 at 12:55?PM Trey Scarborough <t...@3dsc.co> wrote: > > The only thing you have to worry about with shorter cables is the > reflection. In some instances with dirty connector at just the right > connector you can get reflection back in to the transmitter that can cause > errors, the tx to shut down or premature failure. This is very uncommon > with LR 10G and less optics and can be prevented from making sure you have > clean connectors. Check the RX and TX levels and make sure you don't have > excessive loss. With 100G its a little different story due to the combined > power of multiple channels, but still can be prevented by cleaning > connectors, but in some instances Ive had to use attenuation when mixing > different vendor optics. > > The using no launch on an OTDR most automatically calibrating OTDRs will > work without one. Your results can be off though. Most of the lower cost > ones are also lower powered and have less of an RX sensitivity so they > don't suffer as much from the reflections interfering when testing. I can > test all day long with my little otdrs without one, but my long range 200k+ > units I have to have a minimum of a 1k spool on it or you see ghosts. They > will show up as repeating events at even intervals. Not something you will > see on shorter runs either. > > > > On 8/26/24 4:31 PM, Ken Hohhof wrote: > > I should note that apparently I used to do this with direct attach cables > (DAC) but I think that was a pain, one more thing to stock and to bring > with for projects. Whereas I’d always have boxes full of SFPs and fiber > patch cords. > > > > *From:* AF mailto:af-boun...@af.afmug.com <af-boun...@af.afmug.com> *On > Behalf Of *Josh Luthman > *Sent:* Monday, August 26, 2024 4:20 PM > *To:* AnimalFarm Microwave Users Group mailto:af@af.afmug.com > <af@af.afmug.com> > *Subject:* Re: [AFMUG] fiber patch cables > > > > People say you need a launch cable but our cheap china OTDRs have no > issues seeing the connector at the end of the patch cable and stuff > beyond. I bought a big launch cable back in the day and never use it > anymore. > > > > Might be different with AE? > > > > On Mon, Aug 26, 2024 at 5:16?PM <ch...@go-mtc.com> wrote: > > Only minimum length I know of is the OTDR dead zone. If that is a problem > you purposely lengthen the cable with a launch cable. > > > > *From:* Josh Luthman > > *Sent:* Monday, August 26, 2024 1:59 PM > > *To:* AnimalFarm Microwave Users Group > > *Subject:* Re: [AFMUG] fiber patch cables > > > > Reddit is wrong. Gasp. > > > > Connectors are loss, there is more loss in either one of the connectors > than there is the single mode glass. > > > > Between a switch/router in a rack what I see all the time is long (like > 5/10/15 feet) cables and then put the slack in a loop along the posts. > > > > On Mon, Aug 26, 2024 at 1:19?PM TJ Trout <t...@voltbb.com> wrote: > > Patchbox makes some great products, their fiber system is pretty slick but > expensive. > > > > Cable length is irrelevant it's optical budget / Rx signal strength. > Normally on 2-20k LR optics you are ok with any length cable, 40km+ needs a > pad on short spans. (Attenuator) > > > > On Mon, Aug 26, 2024, 8:29?AM Ken Hohhof <khoh...@kwom.com> wrote: > > Is there a minimum length for a single mode fiber patch cable? > > > > I have been using 1 meter cables and they are almost always too long, I’m > talking about going between routers and switches in a rack, stuff like > that. I see that FS sells 0.5 meter cables, but I saw somewhere like maybe > on Reddit someone claiming there was a minimum length. Given SM fiber and > LR optics, I don’t see how 0.5 or 1.0 meter would be different they are > both essentially zero length. > > > > Probably there’s some kind of cable tray or cable management solution I > could be using but I’ve never liked such things. > > -- > 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 > > -- > 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 > > -- > 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 > > ------------------------------ > > -- > 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 > > -- > 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 > -- > AF mailing list > AF@af.afmug.com > http://af.afmug.com/mailman/listinfo/af_af.afmug.com >
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