Interactive Technologies, Inc.

Paul K Severson

Richard M Meidl

Kevin Stebbins

A transformer system couples a control panel with a power line to support two-way communications over the power line. A first transformer steps-down the power line voltage, supplying power to the control panel. A second transformer and associated capacitors provide a low impedance path at the communication signal frequencies and a high impedance path at the power frequency.

Transformer system for power line communications

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.

Audio listen and voice security system

A security alarm network including a plurality of microprocessor-based, subscriber system controllers, wherein each controller is capable of responding to a plurality of distributed wireless and hardwired sensors/transducers and is programmable via user, central station and installer-entered system and network parameters. Each system controller is operable to (a) monitor neighbor system communications and system identification data; (b) maintain a central station programmable identification listing of neighboring systems and, if communication malfunctions occur, communicate with the central station via one or more cooperating neighbor controllers; (c) self-learn the identification data of its distributed sensors; (d) maintain operator and central station-accessible event histories; (e) self-confirm predetermined emergency conditions; (f) regulate communications with the central station relative to pre-programmed, grouped, arming level dependent responses and system parameters; and (g) enable audible monitoring by the central station.

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Richfield, MN, United States of America

Paul K Severson