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Cisco ONS 15600 SDH Troubleshooting Guide, R8.0
July 2010
Chapter 2 Alarm Troubleshooting
2.6.82 FRNGSYNC
If the alarm has cleared, it means a third cycle showed that the TSC card timing modules were
synchronized. If the alarm remains, it means that the ONS 15600 SDH system has had two frequency
mismatch cycles, and indicates a problem with the other TSC card.
Step 4
If the FREQ-MISMATCH alarm remains after three 83-minute cycles, complete the
Using CTC” procedure on page 2-130
to make the TSC card standby.
Step 5
Complete the
“Reset a Card with a Card Pull (Reseat)” procedure on page 2-133
for the standby TSC
card.
The card removal and reboot temporarily clears the alarm.
Step 6
Wait for three intervals of 83 minutes (4 hours and 9 minutes) and check CTC to see if the
FREQ-MISMATCH alarm has recurred. If it has not recurred, the problem is solved.
Step 7
If the alarm has recurred after both TSC cards have been replaced, log into the Technical Support
Website at http://www.cisco.com/techsupport for more information or call Cisco TAC (1 800 553-2447).
2.6.82 FRNGSYNC
Default Severity: Not Alarmed (NA), Non-Service-Affecting (NSA)
Logical Object: NE-SREF
The Free Running Synchronization Mode condition occurs when the reporting ONS 15600 SDH is in
free-run synchronization mode. External timing sources have been disabled and the node is using its
internal clock, or the node has lost its designated BITS timing source. After the 24-hour holdover period
expires, timing slips could begin to occur on an ONS 15600 SDH node relying on an internal clock.
Note
If the ONS 15600 SDH is configured to operate from its internal clock, disregard the FRNGSYNC
condition.
Clear the FRNGSYNC Condition
Step 1
If the ONS 15600 SDH is configured to operate from an external timing source, verify that the BITS
timing source is valid. Common problems with a BITS timing source include reversed wiring and bad
timing cards. Refer to the “Timing” chapter in the
Cisco ONS 15600 SDH Reference Manual
for more
information about it.
Step 2
If the BITS source is valid, clear alarms related to the failures of the primary and secondary reference
sources, such as the
and the
.
Step 3
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).
2.6.83 FSTSYNC
Default Severity: Not Alarmed (NA), Non-Service-Affecting (NSA)
Logical Object: EQPT
Содержание Cisco ONS 15600 SDH
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