Telephone call restriction apparatus
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Aug 24, 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
A telephone call restrictor which is suitable for use in a PABX installation with pulse dial telephones includes a load which may be selectively connectable across the central office lines so as to inhibit reception of pulse signals by the central office when connected. The restrictor includes a detector which provides an output to disconnect the load upon receipt of an access code dialed at the telephone. The restrictor will normally include a prohibited number detector which will be disabled by the output from the access code detector.
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Family
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