Table 1: Alarm Details
Receive Power Out of Specification, Low: The optical power received is below the specified range for operation.
Related Fault Hierarchy
Table 2: DOL Optical Multiplex Sections (OMSs)
ROADM2 or ILA
where the range of n depends on the module.
Table 3: DOL Optical Channels (OCHs)
where channel is an alphanumeric string.
where n depends on the module and channel is an alphanumeric string.
Clearing a PosRxLow Alarm
Follow all applicable safety requirements as described in the BTI7800 Series Hardware Overview and Installation Guide.
- Retrieve statistics for the DOL entity:
show statistics current name:identifier
- Refer to DOL OCH power alarm thresholds or DOL OMS power alarm thresholds to determine whether the optical power received for the entity is lower than the specified range for operation.
- If the optical power received is too low, do the following
to bring the power up to a level within the range, retrieving statistics
for the entity after each task:
Clean the fibers connected to the affected ports.
Change the patch cord fiber.
Check the source of the entity to determine whether it is transmitting at an adequate level.
Check the fibers and any attenuators in the path to ensure that no unintentional attenuation has been added to the path.
- Check for alarms on the DOL entity.
If the alarm clears, you have completed this procedure.
If the alarm does not clear, contact your next level of support.