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OSN 500 550 580 V100R008C50 Alarms and Performance Events Reference 02

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The PUM_TEM_ALM alarm indicates that the working temperature of the pump laser exceeds the threshold. This alarm occurs when the operating temperature of the pump laser on the optical amplifier unit crosses the threshold.


Alarm Severity Alarm Type


Equipment alarm


Name Meaning

Parameter 1 and 2

Indicates the optical port where the alarm is generated.

Parameter 3

Indicates the threshold crossing type. For example, 0x01 indicates the upper threshold is crossed and 0x02 indicates the lower threshold is crossed.

Impact on the System

The pump laser may be aged. Report of this alarm has no impact on the services. If no measure is taken, however, the output optical power of the board is affected in a period of time. This affects the services.

Possible Causes

  • The ambient temperature is excessively high or excessively low.

  • The cooling system of the pump laser is damaged.

  • The pump laser has excessive current.


  1. Check whether the ambient temperature is normal. If not, improve it.
  2. If the alarm persists, perform a warm reset on the faulty board through the NMS.
  3. If the alarm persists, you can reseat the faulty board if it does not affect services.
  4. If the alarm persists, replace the faulty board.

Related Information


Updated: 2019-01-21

Document ID: EDOC1100020975

Views: 76538

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