Cisco ONS 15454 Troubleshooting Manual page 390

2.7.319 PLM-V
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). Statement 293.
Invisible laser radiation could be emitted from the end of the unterminated fiber cable or connector.
Warning
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 could pose an eye hazard. Statement 1056
Warning Use of controls, adjustments, or performing procedures other than those specified could result in
hazardous radiation exposure. Statement 1057
Clear the PLM-P Alarm
Step 1 Complete the
Always use the supplied electrostatic discharge wristband when working with a powered ONS 15454.
Caution
Plug the wristband cable into the ESD jack located on the lower-right edge of the shelf assembly.
If the alarm does not clear, log into the Technical Support Website at http://www.cisco.com/techsupport
Step 2
for more information or call Cisco TAC 1 800 553-2447 in order to report a Service-Affecting (SA)
problem.
2.7.319 PLM-V
A Payload Label Mismatch VT Layer alarm indicates that the content of the V5 byte in the SONET
overhead is inconsistent or invalid. PLM-V occurs when ONS 15454s interoperate with equipment that
performs bit-synchronous mapping for DS-1 signal. The ONS 15454 uses asynchronous mapping.
Clear the PLM-V Alarm
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.
If the signal source matches the card, verify that the SONET VT path originator is sending the correct
Step 2
VT label value. You can find the SONET VT path originator using circuit provisioning steps.
Cisco ONS 15454 Troubleshooting Guide, R8.5
2-196
"Clear the PDI-P Condition" procedure on page
Default Severity: Major (MJ), Service-Affecting (SA)
SONET Logical Object: VT-TERM, VT-MON
Chapter 2 Alarm Troubleshooting
2-194.
November 2009