[NANOG] DWDM More Details

Alex Pilosov alex at pilosoft.com
Fri Apr 25 17:37:50 UTC 2008

On Fri, 25 Apr 2008, John Lee wrote:

> Subscribe to Lightwave (at no charge) and look at the back issues for networks. Show up at Supercom or OFC or what is replacing them and get the latest on ROADM, full channel tunable lasers and maintenance costs.
> What size of network do you want to grow to before replacing the optical link equipment including ILAs?
> Most any org can cost justify a CWDM / CAN since you can add one fiber pair at a time and one lambda per fiber pair.
> DWDM gear is much more expensive and is aimed at 20 to 40 lambdas per
> fiber for service providers while UDWDM and ULHWAN are aimed at trans
> oceanic links and are very very expensive.

DWDM gear is not expensive. Passive muxes cost little. Active 
transceivers cost money but not very expensive at all.

Check out these two presentations (by yours truly et al):


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