RE: [EFM] EFM Requirements
agree with Geoff.
reason that the cable modem market 'works' is that the cable modem is a well
defined demarcation point.
EFM copper modem must be as 'user proof' as a cable modem.
expect to get several emails regarding non-idiot proof cable modems :-).
However, as a dumb limely I can report that I managed not to screw up a cable
modem when installing a new TV for a friend in Flroida earlier this year. It did
re-boot and re-load its' config. after I power cycled it (accidently). Good
job otherwise I would have been sleeping in a rental car
At 04:50 PM 8/13/01 -0400, Sherman Ackley
Q3. (a) For DSL/EFM to succeed in the
marketplace, it is necessary that a
technician does not have to be
dispatched to the home to install a splitter.
(b) In a splitterless
environment, the network signal and the HomePNA signal
will ride the same
cable pair in the house. That makes coexistence a
The reason for this is that pair one will appear in every jack,
two may be cut off in the majority of
I do not agree.
to date have pretty well driven us to the conclusion that there will have to
be a piece of demarcationir equipment that will isolate the line, at least in
the frequency range above voice.
Whether this box requires a truck roll
or can be purchased by the consumer and self-installed is pretty much beside
the point. The box will have to provide the demarcation function and have
functionality (if not hardware) that is owned by the service provider in order
to meet their OA&M requirements.
Further, we can not expect Service
Providers who are operating at the Nyquist limit to be willing to coexist with
and guarantee service in an environment with every piece of uncontrolled hobby
gear that a homeowner has a right to plug into a phone jack.
that isolation and demarcation will not be optional.