Kurt J Hasselfeldt

US Patent:

7248157, Jul 24, 2007

Filed:

May 1, 2001

Appl. No.:

09/845712

Inventors:

John Todd Bergman - River Falls WI, US
Kurt Hasselfeldt - Plymouth MN, US
Thomas Anthony Lee - Lakeville MN, US
Eric W. Lofstad - Eagan MN, US
Brian Karl Seemann - Lakeville MN, US

Assignee:

Interactive Technologies, Inc. - North St. Paul MN

International Classification:

G08B 1/00

US Classification:

340531, 3406918, 340526, 340539, 37939901, 379 9301, 37919201

Abstract:

In one aspect, a phone-interface device determines whether a problem has occurred at a control panel by determining whether a signal from the control panel has been received, and when a signal has not been received within a period of time, the phone-interface device transmits an error message to a monitoring station. In another aspect, the control panel determines whether a problem has occurred at the phone-interface device by determining whether a signal from the phone-interface device has been received, and when a signal has not been received within a period of time, the control panel transmits an error message to a user. In another aspect, the phone-interface device contains memory to buffer data transferred between the control panel and a monitoring station. In this way, a high-speed connection between the phone-interface and the monitoring station can be accommodated while using a lower-speed connection between the phone-interface device and the control panel.

US Patent:

20020163997, Nov 7, 2002

Filed:

May 1, 2001

Appl. No.:

09/845768

Inventors:

John Bergman - River Falls WI, US
Kurt Hasselfeldt - Plymouth MN, US
Thomas Lee - Lakeville MN, US
Eric Lofstad - Eagan MN, US
Brian Seemann - Lakeville MN, US

International Classification:

H04M011/04

US Classification:

379/037000, 379/040000, 379/043000, 379/044000

Abstract:

A phone-interface device receives a wireless signal from a control panel. The wireless signal encodes information regarding a system condition that has occurred in a facility. The phone-interface device communicates the system condition to a monitoring station. The phone-interface device receives its electrical power from the telephone line or from an energy storage device. In another aspect, the phone-interface device receives a provisional-alarm signal command from a control panel. The phone-interface device determines whether a disarm command has been received from the control panel. When a disarm command has not been received before expiration of a period of time, the phone-interface devices sends an alarm condition to a monitoring station.