Cisco Systems 15216 EDFA2 manual Equipment Alarms, Ctmp Case Temperature Out of Range Alarm

Chapter 10 Troubleshooting

Alarm Indicators

F I N A L D R A F T - C I S C O C O N F I D E N T I A L

10.1.3 Equipment Alarms

The ONS 15216 EDFA2 amplifier has three main categories of alarms: optical (DWDM), equipment (EQPT), and environmental (ENV). The equipment alarms are directly related to general equipment conditions in the unit. The ONS 15216 EDFA2 has five equipment alarms:

•CTMP

•LCRNT1

•LCRNT2

•LTMP1

•LTMP2

10.1.3.1CTMP (Case Temperature Out of Range) Alarm

This alarm occurs when the case temperature is out of the threshold range as defined by MINCTMP and MAXCTMP. The values of MINCTMPHYST and MAXCTMPHYST provide the hysteresis required for the alarm to clear. Possible causes for this alarm are:

•The Min and Max thresholds may not reflect the ambient temperature where the ONS 15216 EDFA2 is located: Use RTRV-TH-EQPT to get the Min and Max temperature threshold and change the threshold using SET-TH-EQPT.

•The ambient temperature is too high for a legitimate case temperature alarm to clear: Shut down the ONS 15216 EDFA2 and allow time for it to cool, and do not repower it until the ambient temperature is reduced.

10.1.3.2LCRNT1 and LCRNT2 (Excessive Pump Current) Alarms

These alarms occur when the input power exceeds input range and the ONS 15216 EDFA2 is overdriving the pump laser to try to get the target Gain value. The manufacturer defines this condition as the drive current at greater than 95% of end of life value. The current must drop to 90% of the end-of-life value for the alarm to clear. Possible causes for this alarm are:

•The input power is too high for the gain setting: Reduce the input power by using an external attenuator or by changing the OVERALLGAIN value using the ED-DWDM command.

•One pump laser is degrading: The unit needs to be replaced. Contact the Cisco TAC.

10.1.3.3LTMP1 and LTMP2 (Excessive Pump Temperature) Alarms

These alarms occur when the pump laser has reached a critical temperature threshold. That is, the chip temperature is deviating more than 10 degrees C from the manufacturer-defined set point.

•Ambient temperature is too high so the laser can't cool down: This condition is usually associated with a CTMP alarm. See the CTMP (Case Temperature Out of Range) Alarm section above.

•The ONS 15216 EDFA2 has been operating with excessive pump current for a long period of time, causing the pump(s) to overheat: This condition is usually associated with a LCRNT1 or LCRNT2 alarm. See the LCRNT1 and LCRNT2 (Excessive Pump Current) Alarms section above.

Cisco ONS 15216 EDFA2 Operations Guide

10-6 78-16033-01