Alarm system having bidirectional communication with secured are

Details Alarm system having bidirectional communication with secured are Alarm system having bidirectional communication with secured are

1988-08-23

1990-04-17

Ng, Jin F.

Telephonic communications

Emergency or alarm communications

Responsive to sensed nonsystem condition

379 42, 379 44, 379 45, 379 49, H04M 1104

Patent

active

049187171

ABSTRACT:
A security system which includes a master unit for communication with a central control station by telephone and provides for a plurality of remote detectors located in different zones of a secured area to be selectively wired. The remote detectors communicate through the main power supply with a master unit which is powered by the mains. Microphones in the remote detectors can be selectively operated through the master unit as activated by the central control station to listen in to different zones to permit for identification of a security breach in different zones. A high-volume output mode speaker phone is provided to the master unit. Feedback circuitry generates audible signals when the system is armed or disarmed remotely. Separate activation of interior and perimeter detectors can be effected.

REFERENCES:
patent: 3870830 (1975-03-01), Tapiei
patent: 4273961 (1981-06-01), Blank et al.
patent: 4465904 (1984-08-01), Gottsegen et al.
patent: 4493947 (1985-01-01), Loveless
patent: 4647914 (1987-03-01), Alexander
patent: 4692742 (1987-09-01), Raizen et al.
patent: 4743892 (1988-05-01), Zayle

Affiliated with

Also associated with

Rating

Alarm system having bidirectional communication with secured are does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Alarm system having bidirectional communication with secured are, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Alarm system having bidirectional communication with secured are will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1058367