Board duplexing apparatus for asynchronous transfer mode...

Details Board duplexing apparatus for asynchronous transfer mode... Board duplexing apparatus for asynchronous transfer mode...

2006-05-02

2006-05-02

Pham, Chi (Department: 2667)

Multiplex communications

Fault recovery

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

C370S216000, C370S389000, C370S392000, C370S395100

Reexamination Certificate

active

07039006

ABSTRACT:
A board duplexing system for an asynchronous transfer mode (ATM) switch is provided which improves reliability and system efficiency. Duplexed boards of the ATM switch are monitored to determine if they are processing ATM cells independent of each other, or if a fault has occurred. If a fault has occurred in one of the duplexed boards, a connection to the faulty board is released and a new connection to the remaining board is established. A new version of connection information related to the faulty board is provided to the other board, thus providing an ATM cell service to all subscribers. Once the fault is removed, the system returns to a state in which the pair of boards may operate independently. Thus, if a fault occurs in one of the boards, this duplexing operation results in an increase in system reliability. If no faults are encountered, cells are processed by two independent ATM switch systems, resulting in an increase in system efficiency.

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