SaoPaolo to Frankfurt

Mon Jul 13 14:23:11 UTC 2020

Colin Stanners (lists) wrote on 13/07/2020 14:41:
> Looking at the Wikipedia article, it claims that  Atlantis-2 “can 
> already be upgraded with current technology to 160Gbit/s”. Would be 
> interesting why that wasn’t already done on this 20-year-old cable – 
> assuming that the underground infrastructure (repeaters) are compatible 
> with the newer modulations (or additional wavelengths, but that would 
> have necessitated much more design), the upgrade cost should be small 
> compared to the cable’s value.

160gbit/sec split over a standard 80ch itu dwdm grid sounds like 
2gbit/sec per channel (although there are more efficient options than 
the standard itu grid).  This sounds like it's seriously not worth it 
for today's bandwidth requirements, which might explain why it's only 
viable for voice traffic.

Nick