Multiplex communications – Diagnostic testing – Fault detection
Reexamination Certificate
2007-08-14
2007-08-14
Kizou, Hassan (Department: 2616)
Multiplex communications
Diagnostic testing
Fault detection
C370S228000, C398S005000
Reexamination Certificate
active
10228557
ABSTRACT:
A method and system for effectuating network routing over primary and backup channels. In one embodiment, a primary link is enabled to transfer customer traffic between network nodes, while a transmission quality of the link is monitored. Upon determining the primary link has entered a marginal state, the primary link is disabled such that the network immediately determines it is unavailable. Test traffic is sent over the primary link while monitoring the transmission quality to determine if the link returns to a non-marginal state, and in response thereto the primary link is re-enabled such that the network immediately determines it is available for routing customer traffic again. In one embodiment, rerouting the customer traffic is effectuated by opening and closing the primary link, such that it appears to the network to be disconnected and reconnected. In one embodiment, the primary link comprises a free space optical (FSO) link.
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Filer et al., “Programmable Controllers and Designing Sequential Logic”, 1992, Saunders HBJ Publisher, ISBN 0-03-032322-3, selected pages.
Brannen Carl Andrew
Brown Robert Allen
Lee Randy William
Kizou Hassan
O'Connor Brian T
Terabeam Corporation
Townsend and Townsend / and Crew LLP
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