Specifications

1-65
Cisco ONS 15454 Troubleshooting and Maintenance Guide
November 2001
Chapter 1 Alarm Troubleshooting
Procedure: Clear the PLM-P Alarm Reported on the DS-N Card
Step 1 Verify that all circuits terminating in the reporting card are active:
a. Click the Circuits tab.
b. Verify that the State column lists the port as ACTIVE.
c. If the State column lists the port as INCOMPLETE, wait 10 minutes for the ONS 15454 to fully
initialize. If INCOMPLETE does not change after full initialization, log on to
http://www.cisco.com/tac for more information or call the Cisco Technical Assistance Center to
report a service-affecting problem (1-877-323-7368).
Step 2 After determining the port is active, verify the signal source to the traffic card reporting the alarm.
Step 3 If traffic is being affected, delete and recreate the circuit.
Caution Deleting a circuit may affect traffic.
Step 4 Check the far-end OC-N card that provides STS payload to the DS-N card.
Step 5 Verify the cross-connect between the OC-N card and the DS-N card.
Step 6 Clean the far-end optical fiber:
a. Clean the fiber according to local site practice.
b. If no local practice exists, use a CLETOP Real-Type or equivalent fiber-optic cleaner and follow the
instructions accompanying the product.
Step 7 Replace the OC-N/DS-N cards.
Note When you replace a card with an identical type of card, you do not need to make any changes
to the database.
1.3.94 PLM-V
• Minor, Service affecting
A VT Payload Label Mismatch indicates that the content of the V5 byte in the SONET overhead is
inconsistent or invalid. This alarm occurs when ONS nodes interoperate with equipment that performs
bit-synchronous mapping for DS-1. ONS nodes use asynchronous mapping.
Procedure: Clear the PLM-V Alarm on the DS-1 or DS3XM-6 Card
Step 1 Verify that your signal source matches the signal allowed by the traffic card. For example, the traffic card
does not allow VT6 or VT9 mapping.
Step 2 Verify that the SONET VT path originator is sending the correct VT label value. You can find the
SONET VT path originator using circuit provisioning steps.