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.
Patent No.:
Date of Patent:
May. 04, 2010
Filed:
Dec. 07, 2004
David Lindel Harris, Pleasanton, CA (US);
David Lindel Harris, Pleasanton, CA (US);
Sprint Communications Company L.P., Overland Park, KS (US);
Abstract
Systems and methods are disclosed for performing PMD tests on a fiber span that is in service. For a fiber span transporting data signals in data channels of a data bandwidth, the following methods may be used for PMD tests. For a first method, a light system transmits test signals over test channels outside of the data bandwidth onto the fiber span. The test channels may have wavelengths longer or shorter than the data channels. The PMD measurement system receives the test signals and measures PMD on the fiber span. For a second method, a light system transmits test signals over available channels in the data bandwidth onto the fiber span. The data bandwidth may not be fully utilized for transporting data, so there are data channels available for PMD testing. The PMD measurement system receives the test signals and measures PMD on the fiber span.