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Cisco ONS 15310-CL and Cisco ONS 15310-MA Troubleshooting Guide, R7.0
Chapter 2 Alarm Troubleshooting
2.7.233 SYNCSEC
A Loss of Timing on Primary Reference alarm occurs when the ONS 15310-CL or ONS 15310-MA
loses the primary timing source (reference 1). The system uses three ranked timing references. The
timing references are typically two BITS-level or line-level sources and an internal reference. If
SYNCPRI occurs, the system should switch to its secondary timing source (reference 2). Switching to a
secondary timing source also triggers the “SWTOSEC” alarm on page 2-134.
Clear the SYNCPRI Alarm
Step 1 In node view, click the Provisioning > Timing > General tabs.
Step 2 Verify the current configuration for REF-1 of the NE Reference.
Step 3 If the primary timing reference is a BITS input, complete the “Clear the LOS (BITS) Alarm” procedure
on page 2-93.
Step 4 If the primary reference clock is an incoming port on the ONS 15310-CL or ONS 15310-MA, complete
the “Clear the LOS (OCN) Alarm” procedure on page 2-99.
Step 5 If the condition does not clear, log into the Technical Support Website at
http://www.cisco.com/techsupport for more information or call Cisco TAC (1-800-553-2447).
2.7.233 SYNCSEC
Default Severity: Minor (MN), Non-Service-Affecting (NSA)
SONET Logical Objects: EXT-SREF, NE-SREF
A Loss of Timing on Secondary Reference alarm occurs when the ONS 15310-CL or ONS 15310-MA
loses a secondary timing source (reference 2). If SYNCSEC occurs, the system should switch to a third
timing source (reference 3) to obtain valid timing. Switching to a third timing source also triggers the
“SWTOTHIRD” alarm on page 2-135.
Clear the SYNCSEC Alarm
Step 1 In node view, click the Provisioning > Timing > General tabs.
Step 2 Verify the current configuration of REF-2 for the NE Reference.
Step 3 If the second reference is a BITS input, complete the “Clear the LOS (BITS) Alarm” procedure on
page 2-93.
Step 4 Verify that the BITS clock is operating properly.
Step 5 If the secondary timing source is an incoming port on the ONS 15310-CL or ONS 15310-MA, complete
the “Clear the LOS (OCN) Alarm” procedure on page 2-99.
Step 6 If the alarm does not clear, log into the Technical Support Website at http://www.cisco.com/techsupport
for more information or call Cisco TAC (1-800-553-2447).