Optical communications – Multiplex – Wavelength division or frequency division
Reexamination Certificate
2007-08-07
2007-08-07
Phan, Hanh (Department: 2613)
Optical communications
Multiplex
Wavelength division or frequency division
C398S081000, C398S083000, C398S158000, C398S159000, C398S147000, C398S148000, C398S091000, C398S092000, C398S160000, C398S165000, C398S068000, C385S024000, C385S037000
Reexamination Certificate
active
09960503
ABSTRACT:
A WDM (Wavelength Division Multiplex) terminal device located in a WDM network includes a multiplexing unit that multiplexes a wavelength of a client signal having a single wavelength or a wavelength of at least one of a first plurality of client signals whose wavelengths are multiplexed, to wavelengths of a second plurality of client signals received with their wavelengths being multiplexed, and transmits the second plurality of client signals. Thus, the WDM terminal device can multiplex wavelengths of a plurality of client signals received from a metro WDM terminal device located at a distant place, to a wavelength of another client signal without separating the plurality of client signals by each wavelength, thereby achieving accommodation of a plurality of client signals whose wavelengths are multiplexed, at low cost.
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Fujitsu Limited
Phan Hanh
Staas & Halsey , LLP
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