Patent ID: 6973165
Filing Date: 2005-12-06
Classification: H04L

Abstract:
1. In an alarm reporting apparatus for monitoring a premises for an alarm-condition and for reporting the alarm-condition to an alarm station, said alarm reporting apparatus comprising sensing means for sensing an alarm-condition, reporting means for reporting the alarm-condition to an alarm station via the PSTN, and seizing means for seizing control of the PSTN line at the premises and for disconnecting the premises-wiring from its connection to the PSTN line, the improvement comprising: Signal-generating means operatively associated with said alarm reporting apparatus for generating signals to the premises-wiring for indicating the status of the connection of said alarm reporting apparatus to the PSTN; said signal-generating means comprising voltage-detection means for detecting a voltage on the premises-wiring, and means for supplying central-office functions to the premises-wiring when said voltage-detection means detects no voltage on said premises-wiring; said means for supplying central-office functions to the premises-wiring comprising tone-generating means for generating a distinct signal to the premises-wiring and voltage-generating means for generating voltage to the premises-wiring when said voltage-detection means detects no voltage on the premises-wiring.