Communications system for transmitting and receiving data and voice signals simultaneously through 2-wire signal lines
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United States of America Patent
Stats
-
Jun 2, 1987
Grant Date -
N/A
app pub date -
Dec 13, 1984
filing date -
Dec 16, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A communications system for transmitting and receiving data and voice signals simultaneously on 2-wire signal lines, which superposes and extracts high frequency modulated data signals using a high frequency transformer which is coupled to the 2-wire signal line. The transformer has two windings which are short-circuited with respect to high frequency components, but which pass low frequency voice signals between the 2-wire signal line and a low frequency hybrid circuit.
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