nanog mailing list archives
Re: DWDM Optics cheaper than CWDM Optics?
From: Brandon Martin <lists.nanog () monmotha net>
Date: Tue, 31 Jan 2017 10:39:55 -0500
On 01/31/2017 10:17 AM, 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.
I came to the same conclusion a couple years ago. At the time, CWDM was about the same price as DWDM or maybe still just a hair cheaper, but the DWDM system is a) so much more capable, and b) typically has better tools/monitoring, etc. (if you're using muxponders, etc.) that it made sense to just go DWDM. Given advances in optics, I'm not surprised that DWDM is now cheaper than CWDM outright.
Of course, the same may not be true if you're buying a fully engineered system from a major vendor. CWDM can be a little easier to engineer...sometimes.
-- Brandon Martin
Current thread:
- DWDM Optics cheaper than CWDM Optics? Karl Gerhard (Jan 31)
- RE: DWDM Optics cheaper than CWDM Optics? Luke Guillory (Jan 31)
- Re: DWDM Optics cheaper than CWDM Optics? Bob Evans (Jan 31)
- Re: DWDM Optics cheaper than CWDM Optics? Brandon Martin (Jan 31)
- Re: DWDM Optics cheaper than CWDM Optics? Faisal Imtiaz (Jan 31)
- Re: DWDM Optics cheaper than CWDM Optics? Colton Conor (Jan 31)
- Re: DWDM Optics cheaper than CWDM Optics? Chuck Anderson (Jan 31)