said by bryant313:
are you referring to docsis 3.1 :0
Nope, 3.0 has no restriction on the number of channels bonded. The reason we only had 8x4 was that everyone was pretty much using the same chipset in their modems
Intel released a new Puma series chipset this year that allows for the bonding of up to 24 downstream and 8 upstream and manufactures like Arris are starting to release modems built on this platform into the wild. I saw several companies at Cable Tech Expo in Orlando last month showing off production modems capable of 1Gps downstream from 24 bonded channels.
Though I am not aware of any cable provider that has a Puma 6-based modem on their approved list, it is only a matter of time.
And of course, the MSOs like Cox will need to decide if and how they want to allocate more QAMs for downstream...hmm, do we really need six shopping channels?
The real challenge will be in the upstream as pretty much everyone has their networks setup to only allow upstream frequencies up to 42Mhz. DOCSIS 3 extends this to 85Mhz which provides the potential for bonding more than 4 upstreams but this requires plant modifications to replace filters which is not a cheap proposition...not to mention they would need to dump analog TV which could be a regulatory issue in some franchise areas.