Multiplex communications – Fault recovery – Bypass an inoperative switch or inoperative element of a...
Reexamination Certificate
2002-07-31
2008-10-14
Hsu, Alpus H (Department: 2619)
Multiplex communications
Fault recovery
Bypass an inoperative switch or inoperative element of a...
C370S228000, C340S870030, C398S002000, C714S004110
Reexamination Certificate
active
07436763
ABSTRACT:
A data communication apparatus having a plurality of working ports for exchanging data traffic with a network element and at least one protection port. The communication apparatus also has a protection switching functional element to switch data traffic from a failed working port to the at least one protection port. The protection switching functional element is capable to acquire either one of a first mode of operation and a second mode of operation. The first mode of operation is an 1:Q mode using a single protection port where Q is the number of working ports and Q is equal or greater than 1. The second mode of operation is an M:N mode where M is the number of protection ports and N is the number of working ports, where M and N are greater than 1.
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De Boer Evert E.
Phelps Peter W.
Trudel Richard
Anderson Gorecki & Manaras LLP
Hsu Alpus H
Nortel Networks Limited
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