Variable rate and variable mode transmission system
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United States of America Patent
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Jun 12, 2001
Grant Date -
N/A
app pub date -
Jun 4, 1998
filing date -
Jun 21, 1995
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A public switched telephone network (PSTN) provides communication of digital data from a data provider or LAN to one or more of a plurality of subscriber premises. Asymmetrical digital subscriber line interface units operating at variable rates and in variable modes (ADSL/AVRs) over a local loop offer one-way video-on-demand and other services and carry the necessary signalling between the subscribers and information providers. In an asymmetric mode, the interface units frequency multiplex digital information with voice information to the subscriber and support transmission of a reverse control channel from the subscriber to the central office for transmission back to the information provider. Other modes are supported which permit selective bi-directional and reversible communications as well.
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