Method and system for providing redundancy in security systems served by a public switched telephone network
AssigneeLucent Technologies Inc.
InventorsAkhteruzzaman, Ronald Joseph Rees, Ian Andrew Schorr
Life of this patent
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Abstract
A method and system for providing redundancy for security systems served by the public switched telephone network (PSTN) includes a cable modem interconnected to a security system controller. Upon detection of inoperability of a telecommunications line serving the system via the PSTN, the cable modem extends an alert message to a security monitoring service via a packet data network. Advantageously, the cable modem can also send video images and audio from the secured premises to the security monitoring system due to the bandwidth capabilities of the packet data network.
Claims13
A central office switch comprising:
- a telecommunications line interconnected to a security system;
- means for demodulating a high frequency modulated signal transmitted from a first portion of a severed telecommunications line to a second portion of the severed telecommunications line without processing by an intermediate unit;
- and
- means for originating a call to a central monitoring service in response to receiving the high frequency modulated signal.
A telecommunication device which is coupled by a telecommunications line to a remote system, the telecommunication device comprising:
- means for demodulating a high frequency modulated signal transmitted from a first portion of a severed telecommunications line to a second portion of the severed communications line;
- and
- means for originating an alert in response to receiving the high frequency modulated signal.
A method for sensing a communication disruption between a telecommunication device coupled by a telecommunications line to a remote system, method comprising the steps of:
- receiving a high frequency signal transmitted from a first portion of a severed communications line to a second portion of the severed communications line;
- and
- originating an alert in response to receiving the high frequency signal.
Dependencies are inferred from the claim text.