Telephonic communications – Emergency or alarm communications – Personal monitoring
Patent
1993-07-27
1995-05-30
Chan, Wing F.
Telephonic communications
Emergency or alarm communications
Personal monitoring
379102, 379110, H04M 1104
Patent
active
054209072
ABSTRACT:
Electronic circuitry is provided that is operative to detect telephone usage or doorbell activation, whereupon the circuitry causes a command signal, such as a muting signal recognizable by an audio or sound producing device, to be emitted and deactivate or mute the device. With respect to muting in response to a phone call, a manual operator input or detection of a telephone on-hook condition causes the device to be restored. Following doorbell activation induced muting, timing features of the circuitry cause a restoration signal to be sent to the device automatically after a predetermined period of time has elapsed. The muting circuitry is particularly suited as an enhancement to a personal emergency response system, as well as for a remotely monitored alarm system that incorporates a listening device. The system including the muting circuitry can function as a stand-alone system or be tied into an automated building data bus.
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