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DWDM Optics cheaper than CWDM Optics?

daemon@ATHENA.MIT.EDU (Karl Gerhard)
Tue Jan 31 12:25:49 2017

X-Original-To: nanog@nanog.org
From: Karl Gerhard <karl_gerh@gmx.at>
To: nanog@nanog.org
Date: Tue, 31 Jan 2017 16:17:14 +0100
Errors-To: nanog-bounces@nanog.org

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

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