Telephone polling apparatus using a plurality of timers to detect the line conditions
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United States of America Patent
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-
May 6, 1980
Issued Date -
N/A
app pub date -
Jul 3, 1978
filing date -
May 23, 1977
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A telephone polling apparatus uses an energy detection device in cooperation with timing elements to provide discrimination between various conditions on the telephone line. These conditions are (1) a busy condition, (2) an answer condition, which can occur with someone speaking, not speaking, or with a recorded announcement, and (3) a no answer condition.
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Cited Art Landscape
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