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Cisco ONS 15327 Troubleshooting Guide, R3.4
March 2004
Chapter 2 Alarm Troubleshooting
Alarm Procedures
2.6.9 APSCM
• Major (MJ), Service Affecting (SA)
The APS Channel Mismatch (APSCM) alarm occurs when the ONS 15327 expects a working channel
but receives a protection channel. In many cases, the working and protection channels are crossed and
the protect channel is active. If the fibers are crossed and the working line is active, the alarm does not
occur. The APSCM alarm occurs only on the ONS 15327 when bidirectional protection is used on OC-N
cards in a 1+1 configuration.
Warning
Invisible laser radiation might 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 might pose an eye hazard. Use of controls or adjustments or performance of procedures other than
those specified might result in hazardous radiation exposure.
Caution Always use the supplied electrostatic discharge wristband when working with a powered ONS 15327.
Plug the wristband cable into the ESD jack located between the top high-speed and XTC slots.
Procedure: Clear the APSCM Alarm
Step 1 Verify that the working-card channel fibers are physically connected directly to the adjoining node’s
working-card channel fibers.
Step 2 If the fibers are correctly connected, verify that the protection-card channel fibers are physically
connected directly to the adjoining node’s protection-card channel fibers.
Step 3 If the alarm does not clear, log onto http://www.cisco.com/tac for more information or call TAC to report
a service-affecting problem (1-800-553-2447).
2.6.10 APSCNMIS
• Major (MJ), Service Affecting (SA)
The APS Node ID Mismatch (APSCNMIS) alarm occurs when the source node ID contained in the K2
byte of the incoming APS channel is not present in the ring map. The APSCNMIS alarm might occur
and clear when a BLSR is being provisioned. If so, you can disregard the temporary occurrence. If the
APSCNMIS remains, the alarm clears when a K byte with a valid source node ID is received.
Procedure: Clear the APSCNMIS Alarm
Step 1 Complete the “Identify a Ring ID or Node ID Number” procedure on page 2-125 to verify that each node
has a unique node ID number.
Step 2 If the Node ID column contains any two nodes with the same node ID listed, record the repeated node ID.
Step 3 Click Close in the Ring Map dialog box.
