Parallel phone detection circuit
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United States of America Patent
Stats
-
Feb 28, 1995
Grant Date -
N/A
app pub date -
Jan 28, 1993
filing date -
Dec 21, 1992
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A parallel phone detection circuit is described, the function of which is to enable a phone call to be transferred from a first telephone set to a second telephone set. The detection circuit maintains the first telephone set connected to the telephone line until the handset of the second telephone set has been taken off-hook, and then disconnects the first telephone set. The circuit operates by detecting the line current from the telephone line and produces the reference value for comparison purposes related to that line current.
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