Alarm system audio interface tamper and state detection

Details Alarm system audio interface tamper and state detection Alarm system audio interface tamper and state detection

G - Physics

08

B

G08B 23/00 (2006.01) G08B 29/00 (2006.01) H04R 3/00 (2006.01) H04R 3/02 (2006.01)

Patent

CA 2611462

An alarm system comprises: an audio interface comprising: a microphone; a state sensor for sensing a state at the audio interface; a signal generator for generating an inaudible state signal indicative of the state; a multiplexer for combining an audio signal from the microphone and the state signal; a control panel for monitoring sensed conditions at the audio interface; a conductor interconnecting the audio interface to the control panel carrying audio signal and the state signal as combined from the audio interface to the control panel.

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