Security terminal for use with two-way interactive cable system
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United States of America Patent
Stats
-
Nov 30, 1982
Grant Date -
N/A
app pub date -
Aug 29, 1980
filing date -
Aug 29, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A security terminal for use with a two-way interactive cable system. The security terminal develops alarm and supervisory signals, and controls their transmission over the cable when polled by a central station. The terminal discriminates between four different types of alarm condition (burglary, fire, medical and general emergency), and transmits respective coded signals over the cable, or over a switched telephone network if cable transmission is not successful. To further insure that alarm signals are properly transmitted in the event of a cable outage, the terminal responds to a cable-sent test command from the central station by causing the dialer to dial the central station over the switched telephone network; in this way, the dialer mechanism can be tested periodically to insure that it will be operative if needed.
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Family
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