Whether OPA is supported in the OAU>M40V>D40V>OAU pass-through direction


The OAU>M40V>D40V>OAU pass-through direction supports OPA

Other related questions:
Split ratio calculation for the MON port of the OAU board on OSN 6800
The split ratio between the MON port and the OUT port is 1:99. In other words, the optical power of the MON port is 20 dB lower than that of the OUT port, which is calculated using the following formula: Pout (dBm) �?Pmon (dBm) = 10 x lg(99/1) = 20 dB.

M40V rather than D40V being supported by an OSN 8800 platform subrack
M40V is mainly used to commission the incident optical power and flatness during wavelength adding to improve the commissioning precision and avoid mechanical attenuation for easy maintenance. D40V is mainly used to commission the input optical power of OTU boards during wavelength dropping at the receive end. After deployment commissioning, D40V is rarely used. Therefore, no D40V board is developed except TN11D40V. Platform subracks are developed later than TN11D40V and therefore do not support D40V.

NO_BD_PARA alarm on an OAU board on an OSN 6800 NE
Question: Why an OAU board reports a NO_BD_PARA alarm on an OSN 6800 NE of version V100R003 for which ALC is configured? Root cause: None Answer: ALC is inappropriately configured. As a result, the computed value of a required parameter exceeds the maximum OAU gain (31 dB). There is a bug in the software processing mechanism. Due to this bug, when an OAU board uses the extended gain, the value of computed pump current exceeds the maximum value. As a result, a critical alarm is reported. When the software computes the drop-wavelength parameter table and the computed turning point current exceeds the rated current value, the rated current value is used as the turning point current value. Impact: This issue is not triggered under normal configurations. If this issue is triggered, there is no impact on services or functions, and the issue can be rectified by modifying configurations. Version in which the issue has been resolved: V100R003C02B028

Whether software loading is required when an OAU board is added to the OSN 6800
If the OAU board version matches the NE version, no software loading is required.

Whether it is feasible to replace OBU in the OSN 6800 with OAU
OAU boards have greater gain than OBU boards. Replacing OBU with OAU will increase the line gain. Large gain, however, will introduce noises. Therefore, the replacement is not recommended. You are advised to use Huawei professional WDM network optimization service to evaluate the entire network performance before determining a replacement solution.

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