DOCSIS 3.0 Devices supporting DOCSIS 3.0 will begin shipping at some point in 2007, but most analysts believe that the technology won't begin to take off until 2010 or 2011. Even then, only 40 percent of customer premises equipment (e.g., modems) will support DOCSIS 3.0 by 2011. DOCSIS3.0 delivers speeds 160Mbps down and 120Mbps up.
When DOCSIS 3 is realized it will be wanting another 12.8MHz for upstream along with 24MHz down, and even then with only 16QAM 3.2MHz channels it'll only deliver 160 down 40 up. To do more will require either cleaner networks, making 32, 64 and 128 QAM upstream channels doable, or more upstream spectrum making 6.4MHz channels achievable.
There will be a few challenges to planners of DOCSIS 3 roll outs in North America, far more problematic than Europe where the usual sub split is 5-65MHz up.
