Specifications

1-11
Cisco ONS 15454 Troubleshooting and Maintenance Guide
November 2001
Chapter 1 Alarm Troubleshooting
Note When replacing a card with an identical type of card, you do not need to change the CTC
database.
1.3.12 APSMM
• Minor, Non-service affecting
An APS Mode Mismatch failure occurs when there is a mismatch of the protection switching schemes
at the two ends of the span. If one node is provisioned for bidirectional switching, the node at the other
end of the span must also be provisioned for bidirectional switching. If one end is provisioned for
bidirectional and the other is provisioned for unidirectional, an APSMM alarm occurs in the ONS node
that is provisioned for bidirectional. This alarm occurs in a 1+1 configuration.
Procedure: Clear the APSMM Alarm in 1+1 Mode
Step 1 For the reporting ONS 15454, display the CTC node view and click the Provisioning > Protection tabs.
Step 2 Choose the 1+1 protection group configured for the OC-N cards.
This is the protection group optically connected (with DCC connectivity) to the far end.
Step 3 Record whether the bidirectional switching box is checked.
Step 4 Log into the far end node and verify that the OC-N 1+1 protection group is provisioned.
This is the protection group optically connected (with DCC connectivity) to the near end.
Step 5 Verify that the bidirectional switching box matches the checked or unchecked condition of the box
recorded in Step 3. If not, change it to match.
Step 6 Click Apply.
1.3.13 AUTOLSROFF
• Critical, Service affecting
Warning On the OC-192 card, the laser is on when the card is booted and the safety key is in the on position
(labeled 1). The port does not have to be in service for the laser to be on. The laser is off when the
safety key is off (labeled 0).
Warning Invisible laser radiation may be emitted from the end of the unterminated fiber cable or connector.
Do not stare into the beam directly with optical instruments. Viewing the laser output with certain
optical instruments (for example, eye loupes, magnifiers, and microscopes) within a distance of
100 mm may pose an eye hazard. Use of controls or adjustments or performance of procedures
other than those specified may result in hazardous radiation exposure.