> This is going to be very painful and difficult for a number of DOCSIS3 > operators, including some of the largest ISPs in the USA with multi-millions > of subscribers with tons of legacy coax plant that have no intention of ever > changing the RF channel setup and downstream/upstream asymmetric bandwidth > allocation to provide more than 15-20Mbps upstream per home.
All the large DOCSIS networks of which I am aware are in fact working on changing their spectrum plan and physical layer to enable higher US speeds and in some cases symmetric multi-gig services. JL

