Cisco ONS 15454 Troubleshooting Manual page 184

1.12.1 Bit Errors Appear for a Traffic Card
1.12.1 Bit Errors Appear for a Traffic Card
Symptom
1.12.2 Faulty Fiber-Optic Connections
Symptom
Warning Invisible laser radiation may be emitted from disconnected fibers or connectors. Do not stare into
beams or view directly with optical instruments. Statement 272
Warning Laser radiation presents an invisible hazard, so personnel should avoid exposure to the laser beam.
Personnel must be qualified in laser safety procedures and must use proper eye protection before
working on this equipment. Statement 300
Verify Fiber-Optic Connections
Ensure that a single-mode fiber connects to the ONS 15454 OC-N card.
Step 1
Note
Cisco ONS 15454 Troubleshooting Guide, R8.5
1-140
A traffic card has multiple bit errors.
Possible Cause Faulty cabling or low optical-line levels.
Bit errors on line (traffic) cards usually originate from cabling problems or low
Recommended Action
optical-line levels. The errors can be caused by synchronization problems, especially if pointer
justification (PJ) errors are reported. Moving cards into different error-free slots will isolate the
cause. Use a test set whenever possible because the cause of the errors could be external cabling,
fiber, or external equipment connecting to the ONS 15454. Troubleshoot low optical levels using the
"1.12.2 Faulty Fiber-Optic Connections" section on page
A line card has multiple SONET/DWDM alarms and/or signal errors.
Faulty fiber-optic connections.
Possible Cause
Faulty fiber-optic connections can be the source of SONET/DWDM alarms and
Recommended Action
signal errors. Complete the
Faulty Category-5 cables.
Possible Cause
Faulty Category-5 cables can be the source of SONET/DWDM alarms and
Recommended Action
signal errors. Complete the
Faulty GBICs.
Possible Cause
Faulty GBICs can be the source of SONET/DWDM alarms and signal errors.
Recommended Action
See the "1.12.2.2 Replace Faulty GBIC, SFP, or XFP Connectors" section on page
SM or SM Fiber should be printed on the fiber span cable. ONS 15454 OC-N cards do not use
multimode fiber.
"Verify Fiber-Optic Connections" procedure on page
"1.12.2.1 Crimp Replacement LAN Cables" section on page
Chapter 1 General Troubleshooting
1-140.
1-140.
1-142.
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November 2009