EE535 - PROJECT 3
VDSL - Very High-Rate Digital Subscriber Lines
Section 6.
Conclusions
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This project has presented an overview of the current status of the
discussions about what VDSL should be like in the future. The work
that is currently being done is focusing on solving several problems that
VDSL faces like attenuation, interference on the VDSL signal and
interference of the VDSL signal with other existing communication media.
In addition to the technical difficulties, research is being conducted to
determine which line code will be the most appropriate for the VDSL
standard. GTE is pushing for QAM, the ETSI supports DMT and the
manufacturers of xDSL equipment are promoting the use of CAP. It is clear
that a final VDSL standard will not be seen in the near future.
The ETSI is expecting to publish a first technical report on VDSL by the end
of 1998.
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VDSL can have a bright future for applications like fiber to the
curb / building / basement. We will have to wait for the deployment of ADSL
to have some factual data of the market penetration of the xDSL technologies
and to see how well it performs. These indicators more than likely will
dictate in part the destiny of VDSL.
March 14, 1997. sorrodp@ece.wpi.edu
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