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Cisco ONS 15327 Troubleshooting Guide, R3.4
March 2004
Chapter2 Alarm Troublesho oting Alarm Procedures
•If you are looking at the node view of the ONS 15327, an amber LED depiction with “Sby” has
replaced the white “LDG” depiction on the card in CTC.
Step 8 If the alarm does not clear, complete the “Remove and Reinsert (Reseat) a Card” procedure on
page 2-130 for the traffic card.
Step 9 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).
2.6.174 SWTOPRI
•Not Alarmed (NA), Non-Service Affecting (NSA)
The Synchronization Switch to Primary Reference (SWTOPRI) condition occurs when the ONS 15327
switches to the primary timing source (reference 1). The ONS 15327 uses three ranked timing
references. The timing references are typically two BITS-level or line-level sources and an internal
reference.
Note SWTOPRI is an informational condition. It does not require troubleshooting.
2.6.175 SWTOSEC
•Not Alarmed (NA), Non-Service Affecting (NSA)
The Synchronization Switch to Secondary Reference (SWTOSEC) condition occurs when the
ONS 15327 has switched to the secondary timing source (reference 2). The ONS 15327 uses three
ranked timing references. The timing references are typically two BITS-level or line-level sources and
an internal reference.

Procedure: Clear the SWTOSEC Condition

Step 1 To clear the condition, clear alarms related to f ailures of the p rimary sour ce, such as the SYNCPRI alarm
(see page 2-117).
Step 2 If the condition does not clear, log onto http://www.cisco.com/tac for more information or call TAC
(1-800-553-2447).
2.6.176 SWTOTHIRD
•Not Alarmed (NA), Non-Service Affecting (NSA)
The Synchronization Switch to Third Reference (SWTOTHIRD) condition occurs whe n the ONS15327
has switched to the third timing source (reference 3). The ONS15327 uses three ranked timing
references. The timing references are typically two BITS-level or line-level sources and an internal
reference.