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Cisco ONS 15310-CL and Cisco ONS 15310-MA Troubleshooting Guide, R7.0
Chapter 2 Alarm Troubleshooting
2.7.94 FRCDSWTOSEC
2.7.94 FRCDSWTOSEC
Default Severity: Not Alarmed (NA), Non-Service-Affecting (NSA)
SONET Logical Objects: EXT-SREF, NE-SREF
The Force Switch to Second Timing Source condition occurs when the user issues a Force command to
switch to a second timing source.
Note FRCDSWTOSEC is an informational condition. It does not require troubleshooting.
2.7.95 FRCDSWTOTHIRD
Default Severity: Not Alarmed (NA), Non-Service-Affecting (NSA)
SONET Logical Objects: EXT-SREF, NE-SREF
The Force Switch to Third Timing Source condition occurs when the user issues a Force command to
switch to a third timing source.
Note FRCDSWTOTHIRD is an informational condition. It does not require troubleshooting.
2.7.96 FRNGSYNC
Default Severity: Not Alarmed (NA), Non-Service-Affecting (NSA)
SONET Logical Object: NE-SREF
The Free Running Synchronization Mode condition occurs when the reporting ONS 15310-CL or
ONS 15310-MA is in free-run synchronization mode. External timing sources have been disabled and
the node is using its internal clock, or the node has lost its designated BITS timing source. After the
24-hour holdover period expires, timing slips could begin to occur on a node relying on an internal clock.
Note If the ONS 15310-CL or ONS 15310-MA is configured to operate from its internal clock, disregard the
FRNGSYNC condition.
Clear the FRNGSYNC Condition
Step 1 If the ONS 15310-CL or ONS 15310-MA is configured to operate from an external timing source, verify
that the BITS timing source is valid. Refer to the “Timing” chapter in the Cisco ONS 15310-CL and
Cisco ONS 15310-MA Reference Manual for more information about it.
Step 2 If the BITS source is valid, clear alarms related to the failures of the primary and secondary reference
sources, such as the “SYNCPRI” alarm on page 2-135 and the “SYNCSEC” alarm on page 2-136.
Step 3 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).