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To: pat mudge who wrote (1788)2/20/2000 8:14:00 PM
From: Mark Laubach  Respond to of 2347
 
Pat,
Does TERN state the risks involved with obtaining DOCSIS 1.2
certification for cable modems and qualification for CMTS's?

Just to refresh everyone, a vendor cannot claim it is DOCSIS until
it passes the appropriate certification(s).

To be certified at DOCSIS 1.2, the hardware and software of that
cable modem need to be certified at DOCSIS 1.0, then DOCSIS 1.1,
then DOCSIS 1.2. Having DOCSIS 1.0 certification for a modem
says nothing about future hardware and software revisions. They
all have to go through certification testing.

Also, the whole DOCSIS certification process essentially levels
the playing field with respect to time-to-market. A contributing
vendor author has no real advantage. Also, as we've seen, a vendor
author may not be first out of the gate with a certified cable
modem, e.g. Nortel/Bay/LANCity. Even though they may be in the
first certification wave at a given DOCSIS level, there's still
high risk at not passing the first time while competitors do pass.

Certification involves cable modems interoperating correctly with
three CMTS's. I can't recall exactly the requirements for
qualification of CMTS's, but they do have to work with some small
number of different vendor cable modems.

Said another way, a cable modem can not be certified unless there are
at least three vendor CMTS's in CableLabs. An a CMTS cannot get
qualified unless there are multiple vendor cable modems. At least,
this is how it has been.

With regards to timing, last I heard, CableLabs may not be ready
to start Version 1.1 certification until this summer or fall.
DOCSIS 1.1 is more complex than 1.0. This may have the impact of
taking longer before they are ready for 1.2 certification testing.
Maybe even into 2002.

Regardless of what happens this year with respect to what ends up
finally in any PHY enhancements, certified "1.2" cable modems don't
appear for awhile.

Mark