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Cisco ONS 15327 Troubleshooting Guide, R3.4
March 2004
Chapter2 Alarm Troublesho oting Alarm Procedures
2.6.88 FRCDSWTOSEC
•Not Alarmed (NA), Non-Service Affecting (NSA)
The Force Switch to Second Timing Source (FRCDSWTOSEC) co ndition occ urs when the us er iss ues 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 source s have been disa ble d and t he n ode 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 incl ude reversed wi ring and ba d timi ng
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.