Communications: electrical – Condition responsive indicating system – With particular system function
Patent
1995-06-07
1998-04-07
Faile, Andrew
Communications: electrical
Condition responsive indicating system
With particular system function
340531, 34082506, 367197, 381 58, G08B 2900
Patent
active
057369275
ABSTRACT:
A security alarm system including multiple, zone distributed audio monitors and alarm sensors which report and verify detected alarms and communicate with a system controller and central station. Ambient audio is continuously and selectively recorded in a storage memory and is replayable to verify alarms detected at the alarm sensors. During pre-alarm conditions, all audio inputs are summed and recorded. During an alarm state, the audio input of the audio monitor physically closest to a reporting alarm sensor is automatically selected and the post-alarm audio activity is recorded only for that sensor. The central station is able to selectively communicate via a phone link with each audio controller and engage in half duplexed voice communication with the alarm site, remotely playback and listen to the locally recorded audio data, or program each audio controller. The monitored audio data is stored in RAM storage in discreet segments corresponding to predetermined periods of pre-alarm and post-alarm data.
REFERENCES:
patent: 4918717 (1990-04-01), Bissonnette et al.
patent: 5109278 (1992-04-01), Erickson et al.
patent: 5227776 (1993-07-01), Starefoss
patent: 5321396 (1994-06-01), Lamming et al.
Severson Paul
Stebbins Kevin
Christensen Andrew B.
Faile Andrew
Interactive Technologies Inc.
Tschida D. L.
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