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WT stands for wavelength tracker.
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It’s a very important feature I’m DWDM technology presented by Nokia.
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This feature assist in service tracking along WDM network.
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Through this feature we can easily track each wavelength and identity the route of traffic flow.
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We can check the power values and verify the cross connection is correct.
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WT help in optical power mangment and identify whether the power values within the permitted range or not.
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WT allow assign 2 digits to each wavelength to let us trave the wavelength end to end.
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this code called wave key and it should be unique.
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it can be assigned manually in some cases but recommended to be automatically.
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this is done in the transponder card by NE software.
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WT used in troubleshooting purposes, fiber cut or power fluctuations cases.
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