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:
Jan. 20, 2009
Filed:
Jan. 30, 2006
Takehiro Tsuritani, Fujimino, JP;
Tomohiro Otani, Fujimino, JP;
Takehiro Tsuritani, Fujimino, JP;
Tomohiro Otani, Fujimino, JP;
KDDI Corporation, Tokyo, JP;
Abstract
Between photonic cross connects (PXCs)andan in-use system path passing through transmission apparatus (WDMs)andare set, and a backup system passing through transmission apparatus (WDMs)andis set. The WDMsandlink to the PXCsandand release masking therebetween when the in-use system path is set, and set masking therebetween when the in-use system path is deleted. The WDMsandincluded in the in-use system path transmit an alarm to a monitoring system when an input light is turned off, and the WDMsandincluded in the backup system path do not transmit an unintended alarm to the monitoring system even when the input light is turned off.