Patent ID: 7573981
Filing Date: 2009-08-11
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: a signaling system 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 signaling system comprising a voltage detector for detecting a voltage on the premises-wiring, and a PSTN simulator for supplying central-office functions to the premises-wiring when said voltage detector detects no voltage on said premises-wiring; said PSTN simulator for supplying central-office functions to the premises-wiring comprising a voltage generator for generating voltage to the premises-wiring when said voltage detector detects no voltage on the premises-wiring.