Daniel Frankel reports, “because 3.1 was not available in upstream. ... I think it’ll be in 2017.” Comcast's $70 gigabit downstream is available today in parts of Chicago, Nashville, and Nashville with a promise to cover over 40M homes by 2018. The upstream is limited to 35 megabits, but that's about to change.Jorge Salinger is ready as soon as the vendors can deliver. Casa Systems has already demonstrated 400 megabits upstream and will soon show 600 megabits. They will only offer gigabits downstream in 2016,
I had heard from cable people that they would wait for Full Duplex before upgrading speeds, so this is good news. Full Duplex - sending both upstream and down in the same spectrum - is an active project at CableLabs but likely 3-7 years from volume deployment. Comcast instead will use dedicated spectrum for upstream, possibly eight 6 MHz channels. AT&T is serious about adding 12M "gigabit" homes, using GPON and G.fast, and Comcast wants to be able to match the gigabits soon available to about 30% of the U.S.
Cable systems are about to get a massive capacity improvement with software defined CCAPs running on easily upgradable hardware. Harmonic has just entered the market with a software-defined unit running on a common, off-the-shelf Intel PC.