1:N protection in an optical terminal

Details 1:N protection in an optical terminal 1:N protection in an optical terminal

2006-08-02

2009-11-03

Phan, Hanh (Department: 2613)

Optical communications

Fault recovery

Bypass inoperative element

C398S002000, C398S003000, C398S004000, C398S010000, C398S017000, C398S022000, C398S030000, C398S033000, C398S079000, C370S216000, C370S217000, C370S218000, C370S227000, C370S228000

Reexamination Certificate

active

07613392

ABSTRACT:
A communication network comprising at least one first terminal, at least one second terminal, a plurality of links, and at least first and second nodes. The first node is bidirectionally coupled to the first terminal through at least a first one of the links, and also is bidirectionally coupled to the second terminal through at least a second link and the second node. Preferably, the first node comprises a plurality of communication paths, each of which is coupled at a first end thereof to at least one corresponding first link. Second ends of the communication paths are all coupled to the second link, through a multiplexing device, and route signals between the first and second links. The first node also preferably comprises at least one alternate communication path having a first end coupled through the multiplexing device to the second link, at least one switch that is coupled to the alternate communication path, and a detector for detecting a failure in at least one of the communication paths. A controller is coupled to the detector and the switch. The controller is responsive to the detector detecting a failure in at least one of the communication paths for controlling the switch to couple the alternate communication path to a corresponding first link, thereby enabling a signal to be routed between that first link and the second link through the alternate communication path.

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