Cisco ONS 15310-MA Troubleshooting Manual page 65

Chapter 2 Alarm Troubleshooting
2.7.83 FRCDSWTOTHIRD
The Force Switch to Third Timing Source condition occurs when the user issues a Force command to
switch to a third timing source.
FRCDSWTOTHIRD is an informational condition. It does not require troubleshooting.
Note
2.7.84 FRNGSYNC
The Free Running Synchronization Mode condition occurs when the reporting ONS 15310-MA SDH 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.
If the ONS 15310-MA SDH is configured to operate from its internal clock, disregard the FRNGSYNC
Note
condition.
Clear the FRNGSYNC Condition
Step 1 If the ONS 15310-MA SDH 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-MA SDH Reference
Manual for more information about it.
If the BITS source is valid, clear alarms related to the failures of the primary and secondary reference
Step 2
sources, such as the
If the condition does not clear, log into the Technical Support Website at
Step 3
http://www.cisco.com/cisco/web/support/index.html for more information or call Cisco TAC
(1-800-553-2447).
2.7.85 FSTSYNC
A Fast Start Synchronization Mode condition occurs when the ONS 15310-MA SDH is choosing a new
timing reference. The previous timing reference has failed.
The FSTSYNC condition disappears after approximately 30 seconds. If the condition does not clear, log
into the Technical Support Website at http://www.cisco.com/cisco/web/support/index.html for more
information or call Cisco TAC (1-800-553-2447).
78-18663-01
Default Severity: Not Alarmed (NA), Non-Service-Affecting (NSA)
SDH Logical Objects: EXT-SREF, NE-SREF
Default Severity: Not Alarmed (NA), Non-Service-Affecting (NSA)
SDH Logical Object: NE-SREF
"SYNCPRI" alarm on page 2-134
Default Severity: Not Alarmed (NA), Non-Service-Affecting (NSA)
SDH Logical Object: NE-SREF
and the "SYNCSEC" alarm on page
Cisco ONS 15310-MA SDH Troubleshooting Guide, Release 9.0
Alarm Procedures
2-135.
2-65