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Cisco ONS 15310-CL and Cisco ONS 15310-MA Troubleshooting Guide, R7.0
Chapter1 General Troubleshooting
1.10.8 Free-Running Synchronization Mode
1.10.8 Free-Running Synchronization Mode
Symptom The clock is running at a different frequency than normal and the free-running
synchronization(2.7.96 FRNGSYNC) alarm appears.
Table 1 -27 describes the potential cause of the symptom and the solution.
1.10.9 Daisy-Chained BITS Not Functioning
Symptom You are unable to daisy-chain the BITS.
Table 1 -28 describes the potential cause of the symptom and the solution.
1.10.10 Blinking STAT LED after Installing a Card
Symptom After installing a card, the STAT LED blinks continuously for more than 60 seconds.
Table 1 -29 describes the potential cause of the symptom and the solution.
Table1-27 Free-Running Synchronization Mode
Possible Problem Solution
No reliable reference
input is available.
The clock is using the internal oscillator as its only frequency reference. This
occurs when no reliable, prior timing reference is available. See the
“FRNGSYNC” alarm on page2-66 for a detailed description of this alarm.
Table1-28 Daisy-Chained BITS Not Functioning
Possible Problem Solution
Daisy-chaining BITS is
not supported on the
system.
Daisy-chaining BITS causes additional wander buildup in the network and
is therefore not supported. Instead, use a timing signal generator to create
multiple copies of the BITS clock and separately link them to each node.
Table1-29 Blinking STAT LED on Installed Card
Possible Problem Solution
The card cannot boot
because it failed the
Power On Shelf Test
(POST) diagnostics.
The blinking STAT LED indicates that POST diagnostics are being
performed. If the LED continues to blink more than 60 seconds, the card has
failed the POST diagnostics test and has failed to boot.
If the card has truly failed, an EQPT-BOOT alarm is raised against the slot
number with an “Equipment Fails To Boot” description. Check the alarm tab
for this alarm to appear for the slot where the card is installed.
To attempt recovery, remove and reinstall the card and observe the card boot
process. If the card fails to boot, replace the card.