Cisco ONS 15454 Troubleshooting Manual page 183
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Also See for ONS 15454:
- Procedure manual (850 pages) ,
- Reference manual (728 pages) ,
- Software feature and configuration manual (232 pages)
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Chapter 1
General Troubleshooting
Note
1.11.9 Free-Running Synchronization Mode
Symptom
appears.
1.11.10 Daisy-Chained BITS Not Functioning
Symptom
1.11.11 Blinking STAT LED after Installing a Card
Symptom
1.12 Fiber and Cabling
This section explains problems typically caused by cabling connectivity errors. It also includes
instructions for crimping Category-5 cable and lists the optical fiber connectivity levels.
November 2009
The ONS 15454 supports holdover timing per Telcordia GR-436 when provisioned for external
(BITS) timing.
The clock is running at a different frequency than normal and the
No reliable reference input is available.
Possible Cause
The clock is using the internal oscillator as its only frequency reference. This
Recommended Action
occurs when no reliable, prior timing reference is available. See the
page 2-114
for a detailed description.
You are unable to daisy chain the BITS sources.
Daisy-chained BITS sources are not supported on the ONS 15454.
Possible Cause
Daisy-chained BITS sources cause additional wander buildup in the network
Recommended Action
and are therefore not supported. Instead, use a timing signal generator to create multiple copies of
the BITS clock and separately link them to each ONS 15454.
After installing a card, the STAT LED blinks continuously for more than 60 seconds.
The card cannot boot because it failed the Power On Shelf Test (POST) diagnostics.
Possible Cause
The blinking STAT LED indicates that POST diagnostics are being performed.
Recommended Action
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
with an "Equipment Failure" description. Check the alarm tab for this alarm to appear for the slot
where the card was installed. To attempt recovery, remove and reinstall the card and observe the card
boot process. If the card fails to boot, replace the card. Complete the
Card" procedure on page
2-273.
Cisco ONS 15454 Troubleshooting Guide, R8.5
1.11.9 Free-Running Synchronization Mode
"FRNGSYNC" alarm
"FRNGSYNC" condition on
"EQPT" alarm
is raised against the slot number
"Physically Replace a Traffic
1-139
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