Optical communications – Multiplex – Optical local area network
Reexamination Certificate
2005-01-21
2010-02-16
Bello, Agustin (Department: 2613)
Optical communications
Multiplex
Optical local area network
C398S016000, C398S010000, C398S034000
Reexamination Certificate
active
07664397
ABSTRACT:
An optical network system enabling confirmation of connection and tracking of wavelength paths at a high speed and a low cost without introducing any special hardware by having a wavelength path monitoring unit in an NMS give temporary change of optical power through a change generating unit to an optical signal S from an optical transmitting/receiving node, by having a change detecting unit confirm that this change of optical power has propagated through an optical transmission line and appeared at each node on the way, and confirming connections and monitoring the wavelength path while confirming the presence of the change.
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Office Action mailed on Nov. 27, 2007 and issued in corresponding Japanese Patent Application No. 2004-226800.
Japanese Patent Office Action, mailed Mar. 11, 2008 and issued in corresponding Japanese Patent Application No. 2004-226800.
Katagiri Toru
Naito Takao
Yuki Masahiro
Bello Agustin
Fujitsu Limited
Staas & Halsey , LLP
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