| 摘要 |
A switching matrix includes a first line control section configured to control a first input port using a first determination function of a first SONET framer, to forward a first data signal to a switching fabric when the first data signal is being received normally and to cut-off forwarding of the first data signal to the switching fabric when the first data signal is being received abnormally. The switching matrix also includes a second line control section configured to control a second input port using a second determination function of a second SONET framer, to forward a second data signal to the switching fabric when the first data signal is being received abnormally and to cut-off forwarding of the second data signal to the switching fabric when the first data signal is being received normally, where the second line control section is different from the first line control section.
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