Optical path cross-connect and optical wavelength...
Optical protection scheme
Optical protection switching using 2 by 2 switching functions
Optical reroutable redundancy scheme
Optical ring network with optical subnets and method
Optical ring protection apparatus and methods
Optical ring transmission system using squelch method
Optical shared protection ring for multiple spans
Optical signal changeover device and optical signal...
Optical signal switching device for use in an optical...
Optical switch having an autorestoration feature for...
Optical telecommunication system with automatic channel...
Optical transmission apparatus
Optical transmission apparatus
Optical transmission equipment
Optical transmission equipment
Optical transmission system with bidirectional connection...
Optical transmission systems including optical protection...
Optical transmission systems, devices, and methods