Multiplex communications – Fault recovery – Bypass an inoperative switch or inoperative element of a...
Reexamination Certificate
1999-03-24
2009-06-23
Pham, Chi H. (Department: 2616)
Multiplex communications
Fault recovery
Bypass an inoperative switch or inoperative element of a...
Reexamination Certificate
active
07551549
ABSTRACT:
A method and apparatus for line card redundancy in a communication switch is presented. The switch includes an arbiter coupled to the input of a switch core and a line card pair. The first line card of the line card pair is considered an active line card, whereas the second line card of the line card pair is considered the redundant, or inactive, line card. The active and inactive line cards are determined based on selection information received by the arbiter. Based on the selection information, the arbiter preferentially provides ingress data from the active line card to the corresponding input of the switch core. A router is coupled to the line card pair and to an output of the switch core. The router passes egress data from the switch core to at least one of the first and second line cards based on routing information included in the egress data.
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Chow Henry
Janoska Mark William
Alcatel-Lucent Canada Inc.
Hoang Thai D.
Pham Chi H.
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