Unit switching apparatus with failure detection

Details Unit switching apparatus with failure detection Unit switching apparatus with failure detection

1996-12-06

2000-02-01

Horabik, Michael

Multiplex communications

Fault recovery

Bypass an inoperative station

370217, 370244, 34082501, 34082516, 379279, 714 2, H04B 174

Patent

active

060211113

ABSTRACT:
A unit switching apparatus includes first and second current units, a spare unit, and a switching unit. Each of the current units includes a communication circuit for performing communication in accordance with set operation mode data and a failure detection circuit for detecting and notifying occurrence of a failure in the communication circuit. The spare unit includes a communication circuit for performing communication in accordance with set operation mode data, a memory for separately storing the operation mode data set in the communication circuits of the current units, and a CPU for, when the occurrence of the failure is notified by the failure detection circuit, reading out the operation mode data corresponding to the faulty current unit from the memory, and setting the data in the communication circuit. The switching unit switches the faulty current unit to the spare unit when the occurrence of the failure is notified by the failure detection circuit.

REFERENCES:
patent: 4393493 (1983-07-01), Edwards
patent: 4455645 (1984-06-01), Mijioka et al.
patent: 5311170 (1994-05-01), Wachi et al.
patent: 5343464 (1994-08-01), Iino et al.
patent: 5343477 (1994-08-01), Yamada
patent: 5638358 (1997-06-01), Hagi
patent: 5771225 (1998-06-01), Iino

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