Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Hironori Kadota0
Taku Yoshida0
Yoshinobu Matsukawa0
Yoshiyuki Maeda0
Date of Patent
August 23, 2011
Patent Application Number
12038140
Date Filed
February 27, 2008
Patent Primary Examiner
Patent abstract
An optical transmission apparatus includes redundant line cards each installed with hardware and a CPU. The hardware obtains failure information on redundant lines including a working line and a protection line, and the CPU determines switching control of the redundant lines based on the obtained failure information. Further, the hardware switches the redundant lines based on switching control determined by the CPU, so as to transmit an SDH/SONET optical signal. In the apparatus, from or to hardware installed in each of the redundant line cards, the failure information obtained by the hardware is communicated to hardware installed in a neighboring line card.
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