| 摘要 |
In a cross-connect switch for transmitting an input signal to any one of a plurality of outgoing lines, the cross-connect switch includes a switch of which output port is connected to any one of the plurality of outgoing lines, and each of the plurality of outgoing lines is connected to a predetermined one of a plurality of paths. If the input signal to the cross-connect switch is a wavelength division multiplexing optical signal, then the cross-connect switch further includes a demultiplexer for demultiplexing the input signal into wavelength components, and a multiplexer for multiplexing signals on the outgoing lines which are connected to any one of the plurality of paths. The switch may include a two-stage-linked connection circuit network. Moreover, the cross-connect switch includes a first wavelength converter inserted between the demultiplexer and an input port of the switch, and a second wavelength converter inserted between an output port of the switch and the multiplexer. A conversion wavelength of the second wavelength converter may be variable.
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