Communication method and apparatus
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United States of America Patent
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-
Jan 12, 1988
Grant Date -
N/A
app pub date -
Jun 5, 1985
filing date -
Sep 14, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method of communicating data between first and second communication apparatus having the steps of transmitting line current from the first communication apparatus to a transmission line interconnecting the first and second communication apparatus, the line current being controlled at an analog value representing analog data and having superimposed thereon a digital signal representing digital data, receiving at the second communication apparatus the analog and digital data transmitted by the first communication apparatus, controlling the transmission line voltage at an analog value for transmitting analog data from the second communication apparatus to the first communication apparatus and superimposing on the voltage containing the analog data a digital signal representing digital data, and receiving at the first communication apparatus the analog and digital data transmitted by the second communication apparatus.
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