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Cisco ONS 15454 Troubleshooting Guide, R8.5
November 2009
CONTENTS
Preface xxxv
Revision History xxxv
Document Objectives xxxvi
Audience xxxvi
Related Documentation xxxvi
Document Conventions xxxvii
Obtaining Optical Networking Information xliii
Where to Find Safety and Warning Information xliii
Cisco Optical Networking Product Documentation CD-ROM xliii
Obtaining Documentation and Submitting a Service Request xliv
CHAPTER
1 General Troubleshooting 1-1
1.1 Troubleshooting Circuit Paths with Loopbacks 1-2
1.1.1 Facility Loopbacks 1-3
1.1.1.1 General Behavior 1-3
1.1.1.2 ONS 15454 Card Behavior 1-4
1.1.2 Terminal Loopbacks 1-5
1.1.2.1 General Behavior 1-5
1.1.2.2 ONS 15454 Card Behavior 1-6
1.1.3 Hairpin Circuits 1-8
1.1.4 Cross-Connect Loopbacks 1-8
1.2 Troubleshooting Electrical Circuit Paths With Loopbacks 1-9
1.2.1 Perform a Facility Loopback on a Source Electrical Port (West to East) 1-10
Create the Facility Loopback on the Source DS-1, DS-3, DS3N-12, DS3i-N-12, or EC1 Port 1-10
Test and Clear the DS-3, DS3N-12, DS3i-N-12, or EC1 Port Facility Loopback Circuit 1-11
Create the Facility Loopback on the Source DS3E or DS3XM Port 1-11
Test and Clear the DS3E or DS3XM Port Facility Loopback Circuit 1-12
Test the Electrical Cabling 1-13
Test the Electrical Card 1-13
Test the EIA 1-14
1.2.2 Perform a Hairpin Test on a Source-Node Electrical Port (West to East) 1-15
Create the Hairpin Circuit on the Source-Node Electrical Port 1-15
Test and Delete the Electrical Port Hairpin Circuit 1-16
Test the Standby Cross-Connect Card 1-16
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