Method and apparatus for improving premises-line call availability in an alarm system
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United States of America Patent
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Aug 11, 2009
Grant Date -
May 4, 2006
app pub date -
Dec 1, 2005
filing date -
Jan 10, 2002
priority date (Note) -
In Force
status (Latency Note)
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Abstract
When an alarm panel needs to transmit alarm data, it seizes the PSTN and disconnects the premises-wiring. If in a call, the user is cut off immediately and it appears to the user that the connection to the PSTN has been lost. If trying to place a call, the user also perceives that the connection to the PSTN is lost. The present invention provides tonal signals to the user to indicate that the PSTN line is in use by the alarm panel and also notifies the user when the PSTN connection is available for use.
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