Re: Low to Mid Range DWDM Platforms

[Mark Tinka <mark@tinka.africa>]

On 10/6/23 15:07, Mike Hammett wrote:

> I've been using various forms of passive WDM for years. I have a couple different projects on my plate that require me 
> to look at the next level of platform.
>
> In some projects, I'll be looking for needing to have someone long distances of glass without any electronics. Some 
> spans could be over 60 miles.
>
> In some projects, I'll need to transport multiple 100-gig waves.
>
> What is the landscape like between basic passive and something like a 30 terabit Ciena? I know of multiple vendors in that space, 
> but I like to learn more about what features I need and what features I don't need from somewhere other than the 
> vendor's mouth. Obviously, the most reliability at the least cost as well.

400G-ZR pluggables will get you 400Gbps on a p2p dark fibre over 80km - 
100km. So your main cost there will be routers that will support.

The smallest DCI solution from the leading DWDM vendors is likely to be 
your cheapest option. Alternatively, if you are willing to look at the 
open market, you can find gear based on older CMOS (40nm, for example), 
which will now be EoL for any large scale optical network, but cost next 
to nothing for a start-up with considerable capacity value.

There is a DWDM vendor that showed up on the scene back in 2008 or 
thereabouts. They were selling a very cheap, 1U box that had a different 
approach to DWDM from other vendors at the time. I, for the life of me, 
cannot remember their name - but I do know that Randy introduced them to 
me back then. Maybe he can remember :-). Not sure if they are still in 
business.

Mark.