Cross-connect matrix task prioritizer

Details Cross-connect matrix task prioritizer Cross-connect matrix task prioritizer

2006-03-28

2006-03-28

Pham, Chi (Department: 2667)

Multiplex communications

Fault recovery

Bypass an inoperative switch or inoperative element of a...

C370S225000, C370S386000, C370S388000

Reexamination Certificate

active

07020077

ABSTRACT:
A cross-connect switch (12) uses a matrix (40) for providing connection paths. The matrix (40) includes prioritization logic (42) for receiving connection requests from restoration state machines (50) (for changing connections responsive to line conditions) and an administrative processor (for changing connections responsive to operator commands). Connection requests from both the restoration state machines (50) and the administrative processor (52) are cached in FIFO memories (54). When a FIFO memory (54) stores one or more connection requests, the switching control circuitry is notified by a data ready signal. Logic (56) inhibits passing of the data ready signal from the FIFO memory (54) to the switching control (26) until all restoration connection requests have been serviced.

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