Other

Wheelock, Inc.

Dominic D'Souza

David Salgueiro

Brian E Bizjak

The present invention generally discloses a supervised paging, messaging background music and emergency voice evacuation system. In one embodiment, the system comprises at least one telephone zone controller and at least one telephone zone paging speaker splitter or addressable paging splitter. Specifically, telephone zone controller acts as a controlling authority for the routing and playback of audio in selectable zones. In cooperation with the telephone zone controller, the telephone zone paging speaker splitter is an addressable device that is capable of splitting an audio signal in different manners, e.g., in Class A mode or in Class B mode. The present system provides addressable functions that are not found in existing supervised paging, messaging background music and emergency voice evacuation system.

Supervised paging, messaging background music and emergency voice evacuation system

In one embodiment, the present invention is a method and apparatus for ground fault detection. One embodiment of a method for diagnosing a ground fault in a notification appliance circuit comprising a plurality of field wiring connections includes individually testing each of the plurality of field wiring connections until a source of the ground fault is detected and outputting a signal identifying the source of the ground fault.

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Howell, NJ, United States of America

Dominic D'Souza