Specifications

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Cisco ONS 15454 Troubleshooting and Maintenance Guide
November 2001
Chapter 1 Alarm Troubleshooting
Note This is a condition and not an alarm. It is for information only and does not require troubleshooting.
1.3.113 SWTOSEC
• Not Alarmed (NA) (Condition)
The Switch to Secondary occurs when the ONS 15454 has switched to the secondary timing source
(reference 2). The ONS 15454 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 Alarm
Find and troubleshoot alarms related to failures of the primary source, such as the SYNCPRI alarm.
1.3.114 SWTOTHIRD
• Not Alarmed (NA) (Condition)
The Switch to Third occurs when the ONS 15454 has switched to the third timing source (reference 3).
The ONS 15454 uses three ranked timing references. The timing references are typically two BITS-level
or line-level sources and an internal reference.
Procedure: Clear the SWTOTHIRD Alarm
Find and troubleshoot alarms related to failures of the primary and secondary reference source, such as
the SYNCPRI and SYNCSEC alarms.
1.3.115 SYNCPRI
• Minor, Non-service affecting
A Loss of Timing on Primary Reference alarm occurs when the ONS 15454 loses the primary timing
source (reference 1). The ONS 15454 uses three ranking timing references. The timing references are
typically two BITS-level or line-level sources and an internal reference. If SYNCPRI occurs, the ONS
15454 should switch to its secondary timing source (reference 2). This switch also triggers the
SWTOSEC alarm.
Procedure: Clear the SYNCPRI Alarm on the TCC+ Card
Step 1 From the node view, click the Provisioning > Timing tabs.
Step 2 Check the current configuration for the REF-1 of the NE Reference.
Step 3 If the primary reference is a BITS input, follow the procedure in the “LOS (BITS)” section on page 1-54.
Step 4 If the primary reference clock is an incoming port on the ONS 15454, follow the procedure in the “LOS
(OC-N)” section on page 1-54.