Optical network connection test apparatus and methods

Details Optical network connection test apparatus and methods Optical network connection test apparatus and methods

2007-02-20

2007-02-20

Leung, Christina Y (Department: 2613)

Optical communications

Diagnostic testing

Determination of communication parameter

C398S016000, C398S027000

Reexamination Certificate

active

09332046

ABSTRACT:
A way of testing a wavelength division multiplexed (WDM) system without requiring connection to data source/sink equipment. A test signal is introduced onto a light path of interest in the system, and the test signal is monitored downstream for signal integrity. Lack of signal integrity is used to identify a fault in the lightpath. Alternatively, optical loopbacks may be used to localize and identify a fault in the lightpath. The lightpath includes a source optical node connected to a sink optical node via intermediate optical nodes. An optical signal introduced at the source node with a destination at the sink node may be looped back at any one of the intermediate nodes or the sink node to localize and identify a fault in the lightpath.

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