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Cisco ONS 15600 SDH Troubleshooting Guide, R8.0
July 2010
Chapter 2 Alarm Troubleshooting
2.6.78 FRCDSWTOPRI
2.6.78 FRCDSWTOPRI
The FRCDSWTOPRI condition is not used in this platform in this release. It is reserved for development.
2.6.79 FRCDSWTOSEC
Default Severity: Not Alarmed (NA), Non-Service-Affecting (NSA)
Logical Objects: EXT-SREF, NE-SREF
The Force Switch to Second Timing Source 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.
2.6.80 FRCDSWTOTHIRD
The FRCDSWTOTHIRD condition is not used in this platform in this release. It is reserved for
development.
2.6.81 FREQ-MISMATCH
Default Severity: Minor (MN), Non-Service-Affecting (NSA)
Logical Object: EQPT
The Frequency Mismatch alarm occurs when one of the two TSC cards has a timing module failure that
causes an inconsistency between the TSC card timing frequencies. This alarm can be caused by the active
or standby TSC card.
The ONS 15600 SDH checks timing frequency synchronization in 83-minute (1 hour and 23 minutes)
cycles. The FREQ-MISMATCH alarm occurs if two consecutive timing check cycles show frequency
mismatches. The alarm is cleared if one cycle shows a timing frequency match between the TSC cards.
Clear the FREQ-MISMATCH Alarm
Step 1
Complete the
“Replace a TSC Card” procedure on page 2-136
for the standby TSC card.
Step 2
Wait for two intervals of 83 minutes (2 hours and 46 minutes) and check the node view Alarms tab to
see whether the alarm is cleared.
During the initial 83-minute synchronization check cycle while the replacement standby TSC card is
booting up, the replacement TSC card is attaining the timing from the BITS or internal source so it is
normal that the two TSC cards are not synchronized. The ONS 15600 SDH system disregards the result
of this check cycle and begins keeping track of synchronization in the second 83-minute cycle. If the
result of the cycle shows that the TSC cards are synchronized properly, the alarm is cleared.
Step 3
If the FREQ-MISMATCH alarm did not clear after two timing check cycles, it means that the second
timing cycle resulted in a mismatch. Wait a third 83-minute cycle and check the alarm again.
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