DWDM Optics cheaper than CWDM Optics?

Chuck Anderson cra at WPI.EDU
Tue Jan 31 18:46:58 UTC 2017

I've bought their DWDM 80km 10gig and they are working beautifully on
a couple amplified circuits with both Cisco and Juniper routers.  I've
also bought gray optics and DACs.  The only issue I've noted with some
QSFP+ DACs is some kind of programming issue where the serial number
is mis-read by some models of our Juniper switches.  Another oddity is
that each end of some of our DACs have a separate serial number...we
just record both in our inventory tracking system.

On Tue, Jan 31, 2017 at 04:17:14PM +0100, Karl Gerhard wrote:
> 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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