Well, if you’re a China fearmonger / conspiracy theorist, the Chinese are using OTDRs to spy on us. Probably the cheap Chinese fusion splicers, too. And Chinese finger traps. And Chinese checkers.
From: AF <af-boun...@af.afmug.com> On Behalf Of ch...@go-mtc.com Sent: Monday, August 26, 2024 4:40 PM To: AnimalFarm Microwave Users Group <af@af.afmug.com> Subject: Re: [AFMUG] fiber patch cables Maybe the cheap China one has one built in. From: Josh Luthman Sent: Monday, August 26, 2024 3:19 PM To: AnimalFarm Microwave Users Group 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 <mailto: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 <mailto: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 <mailto: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 <mailto:AF@af.afmug.com> http://af.afmug.com/mailman/listinfo/af_af.afmug.com -- AF mailing list AF@af.afmug.com <mailto:AF@af.afmug.com> http://af.afmug.com/mailman/listinfo/af_af.afmug.com _____ -- AF mailing list AF@af.afmug.com <mailto:AF@af.afmug.com> http://af.afmug.com/mailman/listinfo/af_af.afmug.com -- AF mailing list AF@af.afmug.com <mailto:AF@af.afmug.com> http://af.afmug.com/mailman/listinfo/af_af.afmug.com _____ -- AF mailing list AF@af.afmug.com <mailto:AF@af.afmug.com> http://af.afmug.com/mailman/listinfo/af_af.afmug.com
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