| 摘要 |
PHF 91.583 26.11.1992 : "Data switching device." The device comprises external ports (c1, ..., C72) to be connected to the exterior, switching modules (M1, ..., M9) having switching ports (A1, ..., A6, B1,.... B6) connected to the external ports by means of a connection network. A certain number of connection ports (B1 to B6 of M1, M2, M4, M5, M7, M8) of the modules are designated for backing-up, and a connection network is adapted to connect said back-up ports to the external ports to be backed up. Used in data switching. Figure 1.
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