| 摘要 |
PURPOSE: To widen the band width of communication by making timing internals different from the timing intervals of the data parts of signals. CONSTITUTION: Input signals advance from an upper input port 16a to an upper output port 17a and from a lower input port 16b to a lower output port 17b in a default mode. When switching becomes necessary, a crossing is generated. At crossing, the input signals from the port 16a advance to the port 17b and those from the port 16b advance to the port 17a. As the two kinds of input signals separately enter the ports 17a and 17b, waveguide detectors 15a and 15b incorporated in a switch are used for fetching the small parts of the input signals. The detector of a waveguide 15 converts the signals into electricity from light, so that a local electronic controller 12 processes the signal and decides the set state of the switch, based on the information contained in the header part of the signals. This discriminated signal or control is returned to the switch through an electronic line 13. Thus cross bars are used for eliminating the need of a controller required for overall communication, and the band of information communication is widened by processing the cross bars in parallel. |
