Description of the problem

Querying the optical power of the SLQ1 single board of Huawei OSN3500 equipment, you find that the value of optical power received by all optical ports shows 1837dBm, while the optical power measurement of its optical power received is about -18dBm. The single board model is: SSN1SLQ1-B2 single board, software version 7.54.

Processing

1, replace the normal laser still can not solve the problem, ruled out the laser parameter table error.

2, confirmed by the collection of data, the laser parameter table is not wrong, leading to the root cause of this problem is the SSN1SLQ1-B2 single-board software to read IC2 register error, resulting in "translation" over the laser value error, this failure does not affect the normal work of the single-board, if you want to completely solve this problem need to single-board software upgrades to the If you want to solve this problem completely, you need to upgrade the single board software to version 7.61 or above to solve it.

Root cause

1, laser failure, read the laser parameter table error caused.

2、Single board software read laser value error.

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