Rob Evans via cisco-nsp wrote on 24/01/2024 23:27:
Yeah, as I mentioned, there may be alternatives. Noting that the OP wanted a range of 800km+, do SO also offer a suitable pluggable for the line-side? The ones I could see from a cursory glance appear to be dispersion limited to 450km at 50GHz, or need 100GHz.
oh duh, I missed the 800km+ requirement bit. This is definitely the sort of area where for ease of implementation / longer-term support, getting an off-the-shelf 100G transport device would be useful. A DCI / transponder solution here would leave local hand-off to short-haul optics (lr4 / sr4 / aoc), which abstracts all the complexity / transceiver cost / etc away from any L3 device.
The OP would also need to figure out what's happening with regen in the middle. Is this OEO or optical-only amplification? Link characterisation becomes a thing once you're outside short-haul / metro connectivity.
Obviously this isn't to say that you can't do long haul on alien waves - you certainly can. But I wouldn't like to get involved when something goes wrong and everyone starts finger-pointing at everyone else about whose kit is acting the maggot. Strategically it's usually simpler to abstract off potentially complex areas like this into their own self-contained box which can be managed as a discrete unit. Once you factor in the cost of managing complexity, it's usually no more expensive and often less. All the more so in cases where the A and B ends of a link are different organisations.
There are plenty of market options for this. An internet search for "long haul dci" will give manufacturer names.
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