Where have you seen info re extending upstream from current 5-42 MHz
to as high as 108 or 174 MHz???
U.S. Cable spec, ANSI_SCTE 40 2004, still stipulates 5-42 MHz, the same range
cited in Cisco's latest DOCSIS 3.0 Headend Cable Modem (8 per box):http://www.cisco.com/en/US/prod/coll...d8073584b.html
Note that there is Japanese Tuning Plan version (5-55 MHz) and a
Euro version (5-65 MHz) with 8 MHz channel spacing. But these
are the CURRENT DOCSIS 2.0 tuning plans in those countries.
FWIW, DOCSIS 3.0 Physical spec DOES allow for operation up to 85 MHz.
But since they comply with current U.S. Cable specs, DOCSIS 3.0 Cable
Modems are still constrained to 5-42 MHz...thereby saving $$$$BILLIONS
that would be required to upgrade the ENTIRE fibre-optic & hard cable
distribution network--lots of equipment would be affected, incl local dropamps:http://www.motorola.com/staticfiles/...df?localeId=33