Telephonic communications – Emergency or alarm communications – Responsive to sensed nonsystem condition
Patent
1989-02-08
1991-02-12
Ng, Jin F.
Telephonic communications
Emergency or alarm communications
Responsive to sensed nonsystem condition
379 45, 379 49, 379 51, 379 59, 455 33, H04M 1104, H04Q 700
Patent
active
049930591
ABSTRACT:
An alarm system for a protected premises includes an alarm sensor for generating an alarm signal in the event of an alarm condition. A cellular-type radio/telephone transceiver is located at the protected premises and includes circuitry for generating and transmitting a unique identification number of the transceiver and a send signal for wireless communication with a cellular site. Structure is provided for connecting the alarm signal line to the cellular-type radio/transceiver such that upon receipt of the alarm signal, the cellular-type radio/transceiver will transmit the unique identification number and the send signal to the cellular site with no transmission of the telephone number of an alarm monitoring station to thereby enable the cellular site to transmit the alarm condition to the alarm monitoring station.
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Howison Gregory M.
Smith James L.
Cableguard, Inc.
Chan Wing F.
Ng Jin F.
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