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Cisco ONS 15310-CL and Cisco ONS 15310-MA Troubleshooting Guide, R7.0
Chapter 2 Alarm Troubleshooting
2.7.183 PLM-P
Step 8 If the condition does not clear, log into the Technical Support Website at
http://www.cisco.com/techsupport for more information or call Cisco TAC (1-800-553-2447).
2.7.183 PLM-P
Default Severity: Critical (CR), Service-Affecting (SA)
SONET Logical Objects: STSMON, STSTRM
A Payload Label Mismatch Path alarm indicates that signal does not match its label. The condition is
indicated by an invalid C2 byte value in the SONET path overhead.
This alarm can occur on a 15310-CL-CTX, DS1-28/DS3-EC1-3, or DS1-84/DS3-EC1-3 card when it
expects a DS-1 signal but receives a DS-3 signal. The DS-3 signal C2 byte value is 4, so this causes a
label mismatch and a PLM-P alarm.
Warning
Invisible laser radiation could 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 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 “Clear the PDI-P Condition” procedure on page 2-114.
Step 2 If the alarm does not clear, log into the Technical Support Website at http://www.cisco.com/techsupport
for more information or call Cisco TAC (1-800-553-2447) in order to report a Service-Affecting (SA)
problem.
2.7.184 PLM-V
Default Severity: Major (MJ), Service-Affecting (SA)
SONET Logical Object: VT-TERM
A Payload Label Mismatch VT Layer alarm raises when the content of the V5 byte in the SONET
overhead is inconsistent or invalid. PLM-V occurs when ONS 15310-CLs or ONS 15310-MAs
interoperate with equipment that performs bit-synchronous mapping for DS-1 signal. The node uses
asynchronous mapping.