Sqm; Clear The Sqm Alarm; Ssm-Dus; Ssm-Fail - Cisco ONS 15310-CL Troubleshooting Manual

1.7.211 SQM

1.7.211 SQM
The Sequence Mismatch alarm is a VCAT member alarm. (VCAT member circuits are independent
circuits that are concatenated from different time slots into a higher-rate signal.) The alarm occurs when
the expected sequence numbers of VCAT members do not match the received sequence numbers.

Clear the SQM Alarm

For the errored circuit, complete the
Step 1
Recreate the circuit using the procedure in the "Create Circuits" chapter in the Cisco ONS 15310-CL and
Step 2
Cisco ONS 15310-MA Procedure Guide.
If the alarm does not clear, log into the Technical Support Website at http://www.cisco.com/techsupport
Step 3
for more information or call Cisco TAC (1 800 553-2447) in order to report a Service-Affecting (SA)
problem.

1.7.212 SSM-DUS

The Synchronization Status (SSM) Message Quality Changed to Do-Not-Use (DUS) condition occurs
when the synchronization status message (SSM) quality level degrades to DUS or is manually changed
to DUS.
The signal is often manually changed to DUS to prevent timing loops from occurring. Sending a DUS
prevents the timing from being reused in a loop. The DUS signal can also be sent for line maintenance
testing.
SSM-DUS is an informational condition. It does not require troubleshooting.
Note

1.7.213 SSM-FAIL

The SSM Failed alarm occurs when the synchronization status messaging received by the
ONS 15310-CL or ONS 15310-MA fails. The problem is external to the system. This alarm indicates
that although the system is set up to receive SSM, the timing source is not delivering valid SSM
messages.
Cisco ONS 15310-CL and Cisco ONS 15310-MA Troubleshooting Guide, R7.0
1-130
Default Severity: Critical (CR), Service-Affecting (SA) for STSTRM; Major (MJ),
Service-Affecting (SA) for VT-TERM
SONET Logical Objects: STSTRM, VT-TERM
Default Severity: Not Alarmed (NA), Non-Service-Affecting (NSA)
SONET Logical Objects: BITS, DS1, OCN
Single Failure Default Severity: Minor (MN), Non-Service-Affecting (NSA); Double Failure
Default Severity: Major (MJ), Service-Affecting (SA)
SONET Logical Objects: BITS, DS1, OCN
"Delete a Circuit" procedure on page
Chapter 1 Alarm Troubleshooting
1-156.
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