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FAQ-Why is Laser forced to open automatically

Publication Date:  2012-07-25 Views:  90 Downloads:  0

Issue Description

After upgraded 6800 from the version of V1R4C02B01j to V1R4C04SPC800, OTU board reported LSR_FORCE_OPEN alarm.

Alarm Information

LSR_FORCE_OPEN

Handling Process

We could ignore this alarm temporarily when upgrading. We also could close the status if necessary.

Root Cause

Channel use status was unused and laser status was close before upgrade. OTU board was resetted because of upgrade. Then laser status information was initialized and became the default setting which 
means the changed from close to open. At the same time, the alarm of LSR_FORCE_OPEN was generated in the OTU when the status was unused and open. Furthermore, laser status information cannot be 
saved into the database of SCC card. Once OTU is resetted, it will re-configurated according to its own program and that is the default setting I mentioned. 

Suggestions

 

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