Splitterless digital subscriber line communication system
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United States of America Patent
Stats
-
Aug 8, 2000
Grant Date -
N/A
app pub date -
Oct 3, 1997
filing date -
Oct 3, 1997
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A digital subscriber line communication system does not require the use of a plain old telephone service (POTS) splitter in the resident's home. Digital signal processing techniques are utilized to adapt to varying subscriber line conditions due to POTS telephone equipment. The digital signal processing techniques eliminate the need for a splitter by reducing susceptibility to distortion due to varying subscriber line characteristics. The digital subscriber line modem utilizes quadrature amplitude modulated (QAM) signals and frequency division multiplexing. The digital subscriber line modem includes a control circuit which includes a rapid retrain circuit. The rapid retrain circuit can retrain the digital subscriber line modem in less than 0.5 seconds.
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Family
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