Equipment Alarms - Cisco 15216 EDFA2 Operation Manual

Alarm Indicators

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:
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10.1.3.1 CTMP (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:
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10.1.3.2 LCRNT1 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:
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10.1.3.3 LTMP1 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.
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Cisco ONS 15216 EDFA2 Operations Guide
10-6
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
CTMP
LCRNT1
LCRNT2
LTMP1
LTMP2
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.
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.
Ambient temperature is too high so the laser can't cool down: This condition is usually associated
with a CTMP alarm. See the
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
CTMP (Case Temperature Out of Range) Alarm
Chapter 10 Troubleshooting
section above.
section above.
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