RE: [EFM] EFM Requirements
At 04:50 PM 8/13/01 -0400, Sherman Ackley wrote:
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
(b) In a splitterless environment, the network signal and the HomePNA
will ride the same cable pair in the house. That makes coexistence
necessity. The reason for this is that pair one will appear in
but pair two may be cut off in the majority of homes.
I do not agree.
Our discussion 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
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.
I predict that isolation and demarcation will not be optional.