4. Optical communications
  5. Fault recovery

Koji Takeguchi

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Coupler-based optical cross-connect

Optical communications – Multiplex – Optical switching
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Flexible open ring optical network and method

Optical communications – Fault recovery
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Flexible open ring optical network and method

Optical communications – Multiplex – Wavelength division or frequency division
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Flexible open ring optical network and method

Optical communications – Diagnostic testing – Determination of communication parameter
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Method and system for control signaling in an open ring...

Optical communications – Multiplex – Optical local area network
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