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Alarm Troubleshooting
Clear the PPR-TRIG-EXCD Condition
SUMMARY STEPS
1. Ensure that the fiber connector for the card is completely plugged in. For more information about fiber
connections and card insertion, refer to the Turn Up a Node chapter in the Configuration guide.
2. If the BER threshold is correct and at the expected level, use an optical power meter to measure the power
level of the line to ensure it is within guidelines. For specific procedures to use the test set equipment,
consult the manufacturer.
3. If the optical power level is good, verify that optical receive levels are within the acceptable range.
4. If receive levels are good, clean the fibers at both ends according to site practice. If no site practice exists,
complete the procedure in the Maintain the Node chapter in the Configuration guide.
5. If the condition does not clear, verify that single-mode fiber is used.
6. If the fiber is of the correct type, verify that a single-mode laser is used at the far-end node.
7. Clean the fiber connectors at both ends according to site practice to avoid a signal degrade.
8. Verify that a single-mode laser is used at the far end.
9. If the problem does not clear, the transmitter at the other end of the optical line could be failing and require
replacement. Refer to the "Physical Card Reseating, Resetting, and Replacement" section .
DETAILED STEPS
Step 1
Ensure that the fiber connector for the card is completely plugged in. For more information about fiber connections and
card insertion, refer to the Turn Up a Node chapter in the Configuration guide.
Step 2
If the BER threshold is correct and at the expected level, use an optical power meter to measure the power level of the
line to ensure it is within guidelines. For specific procedures to use the test set equipment, consult the manufacturer.
Step 3
If the optical power level is good, verify that optical receive levels are within the acceptable range.
Step 4
If receive levels are good, clean the fibers at both ends according to site practice. If no site practice exists, complete the
procedure in the Maintain the Node chapter in the Configuration guide.
Step 5
If the condition does not clear, verify that single-mode fiber is used.
Step 6
If the fiber is of the correct type, verify that a single-mode laser is used at the far-end node.
Step 7
Clean the fiber connectors at both ends according to site practice to avoid a signal degrade.
Step 8
Verify that a single-mode laser is used at the far end.
Step 9
If the problem does not clear, the transmitter at the other end of the optical line could be failing and require replacement.
Refer to the "Physical Card Reseating, Resetting, and Replacement" section .
If the condition does not clear, log into the Technical Support Website at
for more information or call Cisco TAC (1 800 553-2447).
PRBS-ENABLED
Default Severities: Not Alarmed (NA), Non-Service-Affecting (NSA)
Logical Objects: OCH
http://www.cisco.com/c/en/us/support/index.html
Cisco NCS 2000 series Troubleshooting Guide, Release 11.0
Clear the PPR-TRIG-EXCD Condition
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Table of Contents
Troubleshooting
