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PosTxLow

 

Table 1: Alarm Details

Parameter

Description

Code

posTxLow

Description/Cause

Transmit Power Out of Specification, Low: The optical power transmitted is below the specified range for operation.

Entities Affected

DOL optical channels (see respective table below).

Default Severity

Critical

Service Affecting

Yes (true).

Alarm Clearing

See Clearing a PosTxLow alarm.

Related Fault Hierarchy

See DOL OCH fault hierarchy.

Table 2: DOL Optical Channels (OCHs)

Entity Name

 

Fault Indicator

Module

Indicator

Status

och:<chassis>/<slot>/0/L1/<channel>

where channel is an alphanumeric string.

ROADM2

–

–

och:<chassis>/<slot>/0/C<n>/<channel>

where n depends on the module and channel is an alphanumeric string.

Clearing a PosTxLow Alarm

Note

Follow all applicable safety requirements as described in the BTI7800 Series Hardware Overview and Installation Guide.

  1. Retrieve statistics for the DOL OCH:
    show statistics current och:identifier
  2. Refer to DOL OCH power alarm thresholds to determine whether the optical power transmitted is lower than the range specified for operation.
  3. If the optical power transmitted is too low, ensure that the upstream fiber connections are intact, thoroughly clean, and correctly connected.
  4. Check for alarms on the DOL OCH.

    • If the alarm clears, you have completed this procedure.

    • If the alarm does not clear, contact your next level of support.