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DWDM Optics cheaper than CWDM Optics?

Subject: DWDM Optics cheaper than CWDM Optics?
From: karl_gerh at gmx.at (Karl Gerhard)
Date: Tue, 31 Jan 2017 16:17:14 +0100

Hello,

fs.com offers DWDM optics that are cheaper than CWDM optics:
CWDM 80km 10G for 600$ http://www.fs.com/c/cisco-cwdm-sfp-plus-2425?70-80km
DWDM 80km 10G for 420$ http://www.fs.com/c/cisco-dwdm-sfp-plus-2485?70-80km

This is significant.
Is this for real? Has anybody bought their DWDM optics?

Going with DWDM and passive Mux/Demux seems to be cheaper nowadays than going with CWDM.

Regards
Karl

Follow-Ups:
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  - From: lguillory at reservetele.com (Luke Guillory)
- DWDM Optics cheaper than CWDM Optics?
  - From: bob at FiberInternetCenter.com (Bob Evans)
- DWDM Optics cheaper than CWDM Optics?
  - From: lists.nanog at monmotha.net (Brandon Martin)
- DWDM Optics cheaper than CWDM Optics?
  - From: faisal at snappytelecom.net (Faisal Imtiaz)
- DWDM Optics cheaper than CWDM Optics?
  - From: colton.conor at gmail.com (Colton Conor)
- DWDM Optics cheaper than CWDM Optics?
  - From: cra at WPI.EDU (Chuck Anderson)

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