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Cisco ONS 15327 Troubleshooting Guide, R3.4
March 2004
Chapter 2 Alarm Troubleshooting
Alarm Procedures
2.6.88 FRCDSWTOSEC
• Not Alarmed (NA), Non-Service Affecting (NSA)
The Force Switch to Second Timing Source (FRCDSWTOSEC) condition occurs when the user issues a
Force command to switch to the second timing source.
Note FRCDSWTOSEC is an informational condition. It does not require troubleshooting.
2.6.89 FRCDSWTOTHIRD
• Not Alarmed (NA), Non-Service Affecting (NSA)
The Force Switch to Third Timing Source (FRCDSWTOTHIRD) condition occurs when the user issues
a Force command to switch to the third timing source.
Note FRCDSWTOTHIRD is an informational condition. It does not require troubleshooting.
2.6.90 FRNGSYNC
• Not Alarmed (NA), Non-Service Affecting (NSA)
The Free-Running Synchronization Mode (FRNGSYNC) alarm occurs when the reporting ONS 15327
is in free run synchronization mode. External timing sources have been disabled and the node is using
its internal clock, or the ONS 15327 has lost its designated BITS timing source. After the 24-hour
holdover period expires, timing slips might begin to occur on an ONS 15327 relying on an internal clock.
Procedure: Clear the FRNGSYNC Alarm
Step 1 If the ONS 15327 is configured to operate from its internal clock, disregard the FRNGSYNC alarm.
Step 2 If the ONS 15327 is configured to operate from an external timing source, verify that the BITS timing
source is valid. Common problems with a BITS timing source include reversed wiring and bad timing
cards.
Step 3 If the BITS source is valid, clear alarms related to the failures of the primary and secondary reference
sources, such as a SYNCPRI alarm (see page 2-117) and a SYNCSEC alarm (see page 2-117).
Step 4 If the alarm does not clear, log onto http://www.cisco.com/tac for more information or call TAC to report
a service-affecting problem (1-800-553-2447).
2.6.91 FSTSYNC
• Minor (MN), Non-Service Affecting (NSA)
A Fast Start Synchronization mode (FSTSYNC) alarm occurs when the ONS 15327 is choosing a new
timing reference. The previous timing reference has failed.