Alarm panel with cellular telephone backup

• US 5,517,547 A
• Filed: 06/20/1995
• Issued: 05/14/1996
• Est. Priority Date: 04/13/1993
• Status: Expired due to Term

• Current Assignee: Tyco Safety Products Canada Limited (Johnson Controls International plc)
• Original Assignee: Nazir Dosani, Nizar Ladha
• Inventors: Dosani, Nazir, Ladha, Nizar
• Primary Examiner(s): Kuntz, Curtis
• Assistant Examiner(s): TROST IV, WILLIAM GEORGE
• Application Number:
  US08/492,605
• Time in Patent Office: 329 Days
• Field of Search: 379/37, 379/39, 379/40, 379/42, 379/46, 379/50, 379/58, 379/59, 455/33.1, 455/54.1, 455/67.7
• US Class Current: 379/40
• CPC Class Codes: H04M 11/04 with alarm systems, e.g. fire, police or burglar alarm systems
• CPC Class Codes: H04M 19/08 with current supply sources at the substations generating ringing current H04M19/04

Abstract

The present invention provides a simplified system for accommodating an alarm monitoring system to effectively communicate with a remote monitoring station by land lines or by a cellular communication channel. This is accomplished in a manner which reprograms the typical operation of an autotelephone dialer in combination with a particular authorization of a cellular interface. This combination results in a system which is reliable, cost effective, and which can be added to many existing alarm systems, which do not have a cellular capability.

Claims

1. In combination an alarm panel and a cellular transceiver arrangement, said alarm panel comprising

an alarm panel microprocessor which receives status signals from a plurality of sensors and based on said received signals produces an alarm signal upon an alarm condition detected by said sensors and communicates said alarm signal in combination with an identification signal to a remote monitoring station using a public telephone system, said alarm panel including

a telephone communication arrangement controlled by said alarm panel microprocessor for communicating with said remote monitoring station, said telephone communication arrangement including an autodialer controlled by said alarm panel microprocessor to operate in a normal mode to initiate a land line based telephone communication with said remote monitoring station or controlled to operate in a cellular mode by initially going to an off-hook condition and awaiting an acknowledgement from the remote monitoring station, said alarm panel microprocessor including logic means for switching to the cellular mode upon a predetermined delay in establishing a land line based telephone communication with said remote monitoring station and causing said alarm panel microprocessor to produce a microprocessor output signal,

said cellular transceiver arrangement including a microprocessor controlled switch means which in a normal mode causes said autodialer to be connected to land based telephone lines and in a cellular mode causes said autodialer to be connected to a cellular transceiver of said cellular transceiver arrangement, said cellular transceiver arrangement including a communication microprocessor connected to said alarm panel microprocessor to receive said microprocessor output signal, said communication microprocessor being connected to and controlling said switch means and causing said switch means to assume the cellular mode upon receipt of said microprocessor output signal with said autodialer of the alarm panel in an off-hook condition awaiting an acknowledgement signal and connected to said cellular transceiver;

said communication microprocessor upon receiving said microprocessor output signal causing said cellular transceiver to initiate a cellular communication channel with the remote monitoring station connected to said autodialer by said switch means, said alarm panel transmitting said alarm signal to said remote monitoring station using said cellular communication channel after an acknowledgement signal is received from said remote monitoring station and recognized by said alarm panel microprocessor.

2. In combination as claimed in claim 1 wherein said alarm panel microprocessor includes the telephone address of the remote monitoring station and said telephone address forms part of said microprocessor output signal, and wherein said communication microprocessor receives and uses said telephone address in forming said cellular communication channel.

3. In combination as claimed in claim 1 wherein said alarm panel and said cellular transceiver are separately contained, said alarm panel including telephone communication ports connected to input ports of said switch means, and said switch means has output ports connected to said telephone lines and all telephone communications of said alarm panel are via said switch means.

4. In combination as claimed in claim 3 wherein said alarm panel includes memory means for storing and maintaining said telephone address.

5. In combination as claimed in claim 1 wherein said cellular transceiver arrangement completes all steps for forming said cellular communication channel, and said alarm panel outputs said alarm signal using said autodialer for normal mode and cellular mode.

6. In combination as claimed in claim 1 wherein said alarm panel microprocessor and said communication microprocessor, in the event of failure to establish a cellular communication channel, cooperate and return control to said alarm panel microprocessor which repeats the sequence of initially establishing a land line telephone communication and if unsuccessful, attempts to form a cellular communication channel.

7. In combination as claimed in claim 2 including means for repeating the steps of initially attempting to form the land line communication channel followed by attempting to form the cellular communication channel.

8. In combination as claimed in claim 7 including means for discontinuing attempting to form either of said communication channels after a predetermined number of failed attempts and storing said alarm signal in a memory device for recall when said alarm panel is in communication with the remote monitoring station.