The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Date of Patent:
Feb. 05, 2013

Filed:

May. 29, 2009
Applicants:

W. Larkin Crutcher, Plano, TX (US);

Anil Kumar Trehan, Plano, TX (US);

Inventors:

W. Larkin Crutcher, Plano, TX (US);

Anil Kumar Trehan, Plano, TX (US);

Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G08B 13/08 (2006.01);
U.S. Cl.
CPC ...
Abstract

A remote door access monitoring system includes a central monitoring component and a remote monitoring component. The central monitoring component includes an optical source, an optical power level receiver, and a microcontroller. The optical power level receiver is in communication with the microcontroller. The remote monitoring component includes an optical switch that is operably associated with a door of a communications equipment cabinet. The communications equipment cabinet is located at a geographical location different from a geographical location of the central monitoring component. The optical source transmits an optical signal from the optical source to the optical switch and back to the optical power level receiver. The optical switch attenuates the optical signal in response to opening and closing of the door. The optical power level receiver is configured to detect an attenuated optical signal and then notify the microcontroller of the existence of an attenuated optical signal.


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