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I've seen this explanation, but it makes no sense

  ver year  download   upload
  1.0 1997  40 Mbit/s  10 Mbit/s
  1.1 2001  40 Mbit/s  10 Mbit/s
  2.0 2002  40 Mbit/s  30 Mbit/s
  3.0 2006  1 Gbit/s   200 Mbit/s
  3.1 2013  10 Gbit/s  1–2 Gbit/s
  4.0 2017  10 Gbit/s  6 Gbit/s
the version previous to the "new version" uploads at 1-2gbit/s which is 40-80x the FCC value

https://en.wikipedia.org/wiki/DOCSIS#Comparison



You may want to scroll down to the “throughput” section, instead of looking at the theoretical max.

The theoretical max up and download aren’t additive. It’s like saying that an egg carton can hold a max of 12 white eggs or 12 brown eggs. Good luck putting 24 eggs in it.

The DOCSIS standards carve up the available throughput, using some of that for upload and some for download.


AFAIK they're on DOCSIS 3.0 and upgrading to DOCSIS 4


These are the spec. Implementations vary. They vary in terms of chips, but also the way they get deployed on existing cable plant.




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