Specifications

1-10
Cisco ONS 15454 SDH Troubleshooting and Maintenance Guide, R3.3
May 2002
Chapter 1 Alarm Troubleshooting
Alarm Procedures
Warning On the OC192 LR/STM64 LH 1550 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.
Caution Always use the supplied electrostatic discharge wristband when working with a powered
ONS 15454 SDH. Plug the wristband cable into the ESD jack located on the middle-right outside edge
of the shelf assembly.
Procedure: Clear the APSCM Alarm
Step 1 Verify that the working-card channel fibers connect directly to the adjoining node working-card channel
fibers.
Step 2 Verify that the protect-card channel fibers connect directly to the adjoining node protect-card channel
fibers.
1.5.6 APSCNMIS
• Major, Service-affecting
The node ID mismatch alarm raises when the source node ID contained in the K2 byte of the APS
channel being received is not present in the ring map. This alarm may occur and clear when an
MS-SPRing is being provisioned. If so, the user can disregard the temporary occurrence. If the
APSCNMIS is raised and stays, the alarm clears when a K byte with valid source node ID is received.
Procedure: Clear the APSCNMIS Alarm
Step 1 Verify that each node has a unique node ID number:
a. Click the Provisioning > Ring tabs.
b. Highlight an MS-SPRing.
c. Click Ring Map.
d. If the Node ID column contains any two nodes with the same node ID listed, record the repeated
node ID.
e. Click Close on the Ring Map dialog box.