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:
Aug. 02, 2011
Filed:
Feb. 21, 2008
Yoshiyuki Maeda, Fukuoka, JP;
Hironori Kadota, Fukuoka, JP;
Taku Yoshida, Fukuoka, JP;
Yoshinobu Matsukawa, Kawasaki, JP;
Yoshiyuki Maeda, Fukuoka, JP;
Hironori Kadota, Fukuoka, JP;
Taku Yoshida, Fukuoka, JP;
Yoshinobu Matsukawa, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
An optical transmission apparatus includes redundant line cards each having a plurality of ports, a hardware unit and a CPU. The hardware unit obtains failure information on redundant lines for each port. The CPU determines switching control of the redundant lines based on the failure information. Then, the hardware unit switches the redundant lines based on the switching control determined by the CPU, so as to transmit an SDH/SONET optical signal in a ring network. The CPU of one of the line cards is set as a master CPU on the corresponding line card to control switching of the redundant lines. Further, the CPU of the other line card is set as a slave CPU.