Whether it is feasible to replace OBU in the OSN 6800 with OAU

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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.

Other related questions:
Fiber connections of the OBU board on an OSN 6800
Fiber connections of the OBU board on an OSN 6800 are as follows: The TC port of the FIU board is connected to the VI port of the OBU board. The VO and IN ports of the OBU board are connected. The OUT port of the OBU board is connected to the IN port of the D40 board.

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.

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

Launch power adjustment of the OBU board on OSN 6800
The gain of an OBU board is fixed , but the gain of an OAU board is adjustable and gain locking and power locking are supported.

Whether services are adversely affected when the OAU board on the OSN 6800 undergoes a warm reset
Theoretically, a warm reset only restarts the board software and does not adversely affect services.

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