How to clear OA_OUT_PWR_ABN alarm?

Hi there！

1. You need to query the actual input and output optical power, standard input and output optical power, power threshold, and amplification gain of the board that reports the alarm.

2. V-O-A is the adjustable optical attenuator of the board. If an OAU or DWSS20/M40v is installed on the device, you need to adjust the V-O-A value to ensure that the receiving end meets the optical power requirements.

3. You need to pay attention to performance events related to WDM performance and optical power.

4. For a WDM system with wavelengths ranging from 41 to 80, the 80-wavelength specification is used. It requires that the output wavelength of the OA board be +1 dBm. 

Formula: P (multiplexed-wavelength) = P (single-wavelength) + 10lgnFor an 80-wavelength system, 

P (multiplexed-wavelength) =1+ 10lg80 =20.03dBm
For a 79-wavelength system, 

P (multiplexed) =1+ 10lg79 =19.98dBm
For a 78-wavelength system, 

P (multiplexed) =1+ 10lg78 =19.92dBm

5. Set the alarm threshold at the following link：

https://support.huawei.com/hedex/hdx.do?docid=EDOC1100197069&id=EN-US_REFERENCE_0309981738&lang=en

Thank you！