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 <mailto: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 > <mailto: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 > <https://www.fs.com/products/43711.html?attribute=4364&id=297095>-- > AF mailing list > AF@af.afmug.com <mailto:AF@af.afmug.com> > http://af.afmug.com/mailman/listinfo/af_af.afmug.com > <http://af.afmug.com/mailman/listinfo/af_af.afmug.com>
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