Protection switching method and apparatus for passive...

Details Protection switching method and apparatus for passive... Protection switching method and apparatus for passive...

2005-12-13

2005-12-13

Pezzlo, John (Department: 2662)

Multiplex communications

Fault recovery

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

C370S227000, C370S389000, C370S407000

Reexamination Certificate

active

06975586

ABSTRACT:
In a protection switching method for a passive optical network system, a communication abnormality is detected in at least one active-system virtual path established between an optical line terminal and a subscriber terminal through a transmission path and a network unit. When a communication abnormality is detected in an active-system virtual path, a switch is controlled to switch the transmission paths to establish a standby-system virtual path between the optical line terminal and the subscriber terminal as a communication partner. A protection switching apparatus for a passive optical network system is also disclosed.

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European Search Report dated Apr. 28, 2005.

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