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:
Feb. 03, 2015
Filed:
Apr. 20, 2011
Hideki Sueoka, Tokyo, JP;
Hideki Sueoka, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
Node equipment, having optical attenuator unitfor optically attenuating wavelength division multiplexing signals received and optical multiplexer/demultiplexer unitfor performing optical multiplexing/demultiplexing of the wavelength division multiplexing signals received from the optical attenuator unitvia an optical cord, includes: output level detecting unitfor detecting the optical power level of the wavelength division multiplexing signals at a pre-stage of the optical cord; input level detecting unitfor detecting the optical power level of the wavelength division multiplexing signals at a post-stage of the optical cord; deciding unitfor deciding abnormality of the optical power level loss through the optical cordfrom the optical power levels detected by the output level detecting unitand input level detecting unit; and control unitfor controlling the optical attenuation of the optical attenuator unitaccording to the abnormality decision result by the deciding unit