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Technology Stocks : LAST MILE TECHNOLOGIES - Let's Discuss Them Here
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To: lml who wrote (2538)12/11/1998 1:43:00 AM
From: Bernard Levy  Read Replies (1) of 12823
 
lml:

May be others on this thread know the topic better
than I do, but one paper which I found quite informative on
the general status of copper loops in the US is the paper
by JJ Werner, ''The HDSL environment,'' in IEEE J. Selected
Areas in Communications in Aug. 91. Even though it addresses
HDSL, it paints a picture of the status of copper loops
which suggests that only about 60% are ready for DSL. Werner
used a Bellcore database generated from surveys taken in the
1970s if I remember correctly. There is also fairly good
information in the recent book ''DSL: Simulation Techniques
and Standards Development for Digital Subscriber Line
Systems, by Walter Chen (MacMillan Technology Series),
another Bellcore alumnus (now at Motorola). Both of the
above references are addressed to EEs (not a general audience).

Concerning your question regarding extending the fiber to
the DLC, it is only a matter of time. It is the only solution
that makes sense in the long run, as ADSL will be replaced by
VDSL, as homes will need a diversified array of video and
data services. At that point, I expect that the fiber + VDSL
architecture might well be extremely competitive with (perhaps
superior to?) the HFC architecture deployed by cable
companies (superiority would stem from the dedicated nature
of a twisted pair, by opposition with the shared and perhaps
soon crowded cable environment, and I am not even discussing
powering issues).

Best regards,

Bernard Levy
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