Communication method and apparatus with transmission of a second signal during absence of a first one
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United States of America Patent
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May 21, 2002
Grant Date -
N/A
app pub date -
Jul 23, 1997
filing date -
Oct 28, 1994
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A network station receives a principal signal and data. When the principal signal is present or contains information it is transmitted to a receiving station through a communications channel. When the principal signal is absent or does not have a significant information content, the network station transmits the data through the same communications channel in a format such that the data is received and output by a further receiving station.
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