don't abuse Shannon's Law like that. There are ways of rotating and polarizing the waves to get thousands of times more information out of every frequency range. Shannon's Law only applies to each specific modulation. There was an article here on work in the lab to commercialize this in the past year or two. Most FTTH use cases could be replaced with this, although FTTH can roll tomorrow and this is still vaporware - 15 years is a lot of productivity.