Telephone circuit
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United States of America Patent
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-
Dec 16, 1997
Grant Date -
N/A
app pub date -
Mar 22, 1996
filing date -
Mar 24, 1995
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A single phase locked loop based device is used to detect alert tones and to decode data in caller display services signalling systems. The device has two sets of components (resistors) to configure the device to perform tone detection and data decoding. One or both of the sets of components are connected to the device by an electronically controlled switch.
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