CATV telephony system using subsplit band for both directions of transmission
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United States of America Patent
Stats
-
Jan 30, 1996
Grant Date -
N/A
app pub date -
Jun 14, 1994
filing date -
Jun 14, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A cable television (CATV) system is modified to provide two-way telephone communications in a subsplit band below the video signal, preferrably in the range of approximately 5-40 MHz. Each line amplifier in the coaxial cable network is equipped with a bypass strap or bypass circuitry to maintain a signal path through the line amplifier for the telephone signal in the event of failure of the line amplifier. Due to the decreased attentuation resulting from its lower frequency, the telephone signal can typically travel the distance of three or four line amplifier spacings without amplification. Line amplifier failure is a common occurrence in CATV networks. Therefore, the present invention greatly increases the reliability of telephone communications over CATV networks.
First Claim
Family
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Cited Art Landscape
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