Precautions for commissioning multiplexed signals

During optical power commissioning of a WDM network, you need to first commission the single-wavelength optical power and then the multiplexed-wavelength optical power. This rule ensures that the attenuation of multiplexed signals is the minimum. If you commission the multiplexed-wavelength optical power first, the attenuation of multiplexed signals may be excessively large and as a result the single-wavelength optical power may fail to be commissioned, causing a commissioning failure.

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