| 摘要 |
The present invention relates to a technology of a crosspoint switch circuit applied to a cross-connect apparatus, an ADM or the like employed in an optical network. According to the present invention, there is provided an arrangement of a crosspoint switch circuit including a plurality of switch cells arrayed in a matrix fashion to form a matrix array, each of the switch cells being formed of a two-input and two-output type switch having a first and second input terminals and a first and second output terminals in which either of the input terminals is made connectable to any of the output terminals, and each of the switch cells being interconnected and controlled in each connecting status so that any one of input highway is made connectable to any of output highway, and external connecting unit provided on each side of the matrix array so that the switch cells arrayed on each side of the matrix array are made connectable to switch cells arrayed on any side of a matrix array of another crosspoint switch circuit which is to neighbor that crosspoint switch circuit. According to the above arrangement, the crosspoint switch circuit can easily and flexibly respond to a request of extensively increasing the channel size under a minimum space limitation. Moreover, the crosspoint switch circuit can be assembled and manufactured with ease.
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