Timer based system for preventing mismatch in automatic...

Details Timer based system for preventing mismatch in automatic... Timer based system for preventing mismatch in automatic...

2007-08-21

2007-08-21

Pham, Chi (Department: 2616)

Multiplex communications

Fault recovery

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

C370S218000, C370S219000

Reexamination Certificate

active

10310436

ABSTRACT:
A method for resolving primary section mismatch at a local node coupled to a remote node with two working sections is disclosed. A first working section is initially identified as the primary section and a second working section is initially identified as the secondary section. The primary section supports network traffic and the secondary section operates as a backup for the primary section. The method includes receiving a status indication change of the working section identified as the primary section at the local node and switching the primary section to the second working section at the local node. A timer is started upon switching the primary section to the second working section at the local node and the primary section is switched back to the first working section at the local node after the timer expires if the other node has not switched its primary section.

REFERENCES:
patent: 6275510 (2001-08-01), Koenig et al.
patent: 6301254 (2001-10-01), Chan et al.
patent: 6421318 (2002-07-01), Coltro
patent: 6728489 (2004-04-01), Tomooka et al.
patent: 2002/0141332 (2002-10-01), Barnard et al.

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