Frame synchronization and fault protection for a...

Details Frame synchronization and fault protection for a... Frame synchronization and fault protection for a...

2003-12-18

2009-02-17

Chan, Wing F (Department: 2619)

Multiplex communications

Fault recovery

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

C370S221000

Reexamination Certificate

active

07492706

ABSTRACT:
According to one embodiment, a telecommunications device includes a bus. A first controller coupled to the bus is operable to generate first pulses for communication using the bus. A second controller coupled to the bus is operable to generate second pulses synchronized with the first pulses for communication using the bus. A card coupled to the bus is operable to receive the first and second pulses, generate internal pulses synchronized with the first and second pulses, compare at least one internal pulse with at least one first pulse to detect a loss of synchronization, and indicate this loss of synchronization to allow the second controller to determine a failure of the first controller.

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