Method and arrangement for detecting faults in a network

Details Method and arrangement for detecting faults in a network Method and arrangement for detecting faults in a network

1997-09-19

2000-12-12

Pascal, Leslie

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359119, 359161, 359166, 370222, 370223, 370224, H04B 1008

Patent

active

061606480

ABSTRACT:
The present invention relates to an arrangement and a method for detecting faults in an optical fiber network, comprising at least two nodes arranged with at least two optical fibers to a bus with the end nodes connected via two spare fibers. Every node comprising a central module (50), at least two protection switches (60,61) and optical amplifiers (21,22,23,24) and said central module comprising at least one central processor (51), at least one logical unit (52), at least one protection signal transmitter (53) and at least one protection signal monitor (54). The end nodes of the bus transmit a protection signal in at least one direction of the bus and said end nodes can detect the own protection signal and the protection signal transmitted from the other end node. All nodes in the bus can detect Optical Power Loss, OPL. The bus will reshape into new end nodes in case of a fault.

REFERENCES:
patent: 4320508 (1982-03-01), Takezoe
patent: 5179548 (1993-01-01), Sandesara
patent: 5265510 (1993-11-01), Hoyer-Ellefsen
patent: 5365510 (1994-11-01), Nicholson et al.
patent: 5442623 (1995-08-01), Wu
patent: 5453827 (1995-09-01), Lee
patent: 5933258 (1999-08-01), Flanagan et al.

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