Screwdriver and a color chart... From: Mark Radabaugh Sent: Wednesday, January 26, 2022 8:39 AM To: AnimalFarm Microwave Users Group Subject: Re: [AFMUG] CWDM vs DWDM, Single Fiber vs Dual fiber
The manufacturers supply a ‘programmer box’ that usually have a USB connector, a SFP slot, and some software to reprogram the SFP’s. The software usually lets you set how the SFP identifies itself to the switch / router so that you can work around the asinine vendors that insist on locking to vendor specific optics, and to set the frequency on the tunable optics. https://www.flexoptix.net/en/flexbox.html?395=1357&co9424= for example. They will send one for free if you order optics from them. Mark On Jan 26, 2022, at 8:25 AM, dmmoff...@gmail.com wrote: How do you tune the tunable optics? Is it done in the config of the router, or do you tune it before installing somehow? From: AF <af-boun...@af.afmug.com> On Behalf Of Mark Radabaugh Sent: Tuesday, January 25, 2022 9:33 PM To: AnimalFarm Microwave Users Group <af@af.afmug.com> Subject: Re: [AFMUG] CWDM vs DWDM, Single Fiber vs Dual fiber We spare with tunable optics. Production is channel specific but spares are tunable to the frequency. Price is usually 4x the fixed optics, but as you noted, having to spare every channel gets pricy. Mark On Jan 25, 2022, at 7:57 PM, dmmoff...@gmail.com wrote: My recollection is the DWDM optics are slightly cheaper, but the CWDM muxes are cheaper. I think if you fully populate the CWDM MUX then the cost was a wash and it didn’t matter which one you bought. If you are only ever going to use a few channels then CWDM is noticeably cheaper. The biggest hassle IMO is inventory and spares. If you’re using 10 different color optics then you need 10 different spares on the shelf. If you use 40 colors that cost $400 each then you need $16,000 in spare optics. That’s not even a bad scenario. Some of the more exotic optics are $2300 from Fiber Store. I have a quote in hand for 80km 100G Arista branded optics from another vendor for over $6000. If you’re using multiple colors of those then you may find yourself with a whole lotta capital tied up in spare parts. From: AF <af-boun...@af.afmug.com> On Behalf Of Carl Peterson Sent: Tuesday, January 25, 2022 4:43 PM To: AnimalFarm Microwave Users Group <af@af.afmug.com> Subject: [AFMUG] CWDM vs DWDM, Single Fiber vs Dual fiber We are leasing a few new strands of dark to a couple locations. On our other paths we have just Done BiDi for our ring or payload and used another for our routed/management network. For these strands, I'm thinking of doing passive WDM. Any benefit to DWDM vs CWDM if you aren't expecting to scale it? Why would you use two strands vs one strand? We generally use one strand for everything, either BiDi or GPON so my brain just sort of assumes that. What am I missing? -- https://www.fs.com/products/43711.html?attribute=4364&id=297095 -- 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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