Key set toll restrictor
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 2, 1982
Grant Date -
N/A
app pub date -
Apr 2, 1980
filing date -
Apr 2, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In a telephone restriction system having circuitry to interrupt the dialing sequence upon detection of a prohibited number, the improvement permitting the restriction system to be disabled by dialing an access code using a standard key set. An access code detector provides an output upon recognition of the access code; this output is used to disable the restriction system including the reset system normally associated therewith for a predetermined period of time to permit the central office line to be released and re-engaged so as to clear the access code therefrom.
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Family
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