4 ms·
The Reuters article made a mistake: > The cable, called Firmina, will be the longest cable in the world, Google said in a blog post, adding that it will run fr
by xpe 5y ago
The Reuters article made a mistake:
> The cable, called Firmina, will be the longest cable in the world, Google said in a blog post, adding that it will run from the East Coast of the United States to Las Toninas, Argentina, with additional landings in Praia Grande, Brazil, and Punta del Este, Uruguay.
This is a misquote from the original https://cloud.google.com/blog/products/infrastructure/announcing-the-firmina-subsea-cable https://cloud.google.com/blog/products/infrastructure/announ... :
> Firmina will be the longest cable in the world capable of running entirely from a single power source at one end of the cable if its other power source(s) become temporarily unavailable—a resilience boost at a time when reliable connectivity is more important than ever.
As you would expect, TRANSPAC is much longer:
> 1995 No.5 Trans-Pacific Cable Network(TPC-5) (Laid cable length: approx.2,958 km)
https://en.wikipedia.org/wiki/Transpac_(cable_system) https://en.wikipedia.org/wiki/Transpac_(cable_system)
- kevincox 5y agoWhat exactly does "additional landings" mean here. I usually think of a cable as connecting two places. Is it basically multiple cables that connect to the same exchange onshore? Or is there a router "at sea" where the cables fork? Or does some of the cable from the US terminates in Brazil, some terminate in Punta del Este, ...
- sithadmin 5y agoDepends on the cable. In some cases, the fiber bundle will be fully terminated at the landing, which serves as a junction point where the logical path for the cable system then resumes via a different cable to the next landing in the path. In other cases, a fraction of the fiber bundle will be split (either physically or with a subsea multiplexer device) and directed to a nearby landing, with the remainder of the fiber continuing onwards.
- virtuallynathan 5y agoOn these newer cables they tend to use wavelength-selective switches at BUs.
- deleted 5y ago[deleted]