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Cisco ONS 15310-CL and Cisco ONS 15310-MA Troubleshooting Guide, R7.0
Chapter 2 Alarm Troubleshooting
2.7.181 OPEN-SLOT
The Out of Use Transport Failure alarm is a VCAT member alarm. (VCAT member circuits are
independent circuits that are concatenated from different time slots into a higher-rate signal.) This
condition is raised when a member circuit in a VCAT is unused. It occurs in conjunction with the
“VCG-DEG” alarm on page 2-144.
Clear the OOT-TPT Condition
Step 1 Complete the “Clear the VCG-DEG Condition” procedure on page 2-145. Clearing that condition clears
this condition as well.
Step 2 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).
2.7.181 OPEN-SLOT
Default Severity: Not Alarmed (NA)
SONET Logical Object: EQPT
The Open Slot condition indicates that there is an open slot in the system shelf. Slot covers assist with
airflow and cooling.
Clear the OPEN-SLOT Condition
Step 1 To install a slot cover and clear this condition, refer to the procedures located in the “Install Hardware”
chapter of the Cisco ONS 15310-CL and Cisco ONS 15310-MA Procedure Guide.
Step 2 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).
2.7.182 PDI-P
Default Severity: Not Alarmed (NA), Non-Service-Affecting (NSA)
SONET Logical Objects: STSMON, STSTRM
A PDI-P is a set of application-specific codes indicating a signal label mismatch failure (SLMF) in the
ONS 15310-CL or ONS 15310-MA STS path overhead. The condition indicates to downstream
equipment that a defect is present in one or more of the directly mapped payloads contained in that STS
synchronous payload envelope (SPE). For example, the mismatch could occur in the overhead to the path
selector in a downstream node configured as part of a path protection. The PDI-P codes appear in the
STS Signal Label (C2 byte).
An SLMF often occurs when the payload does not match what the signal label is reporting. The “AIS”
condition on page 2-18 often accompanies a PDI-P condition. If the PDI-P is the only condition reported
with the AIS, clearing PDI-P clears the AIS. PDI-P can also occur during an upgrade, but usually clears
itself and is not a valid condition.