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Cisco ONS 15454 SDH Troubleshooting Guide, R5.0
July 2005
Chapter 1 General Troubleshooting
1.2.1 Perform a Facility (Line) Loopback on a Source Electrical Port (West to East)
Step 5 Choose the appropriate state (Unlocked; Locked,disabled; Unlocked,automaticInService) from the
Admin State column for the port being tested.
Step 6 Click Apply.
Step 7 Click Ye s in the confirmation dialog box.
Step 8 Complete the “Test the Electrical Card” procedure on page 1-12.
Test the Electrical Card
Step 1 Complete the “Physically Replace a Traffic Card” procedure on page 2-271 for the suspected bad card
and replace it with a known-good one.
Caution Removing a card that currently carries traffic on one or more ports can cause a traffic hit. To avoid this,
perform an external switch if a switch has not already occurred. See the “2.10.2 Protection Switching,
Lock Initiation, and Clearing” section on page 2-260 for basic instructions. For detailed information,
refer to the Cisco ONS 15454 SDH Procedure Guide Chapter 15, “Maintain the Node.”
Step 2 Resend test traffic on the loopback circuit with a known-good card installed.
Step 3 If the test set indicates a good circuit, the problem was probably the defective card. Return the defective
card to Cisco through the RMA process. Log into the Cisco Technical Support Website at
http://www.cisco.com/techsupport for more information or log into
http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml to obtain a directory of toll-free
Cisco Technical Assistance Center (TAC) numbers for your country.
Step 4 Complete the “Physically Replace a Traffic Card” procedure on page 2-271 for the faulty card.
Step 5 In card view for the electrical card, double-click the Maintenance > Loopback tabs.
Note The DS-3 Admin State is the basis of the DS-1 Derived State.
Step 6 Choose None from the Loopback Type column for the port being tested.
Step 7 Choose the appropriate state (Unlocked; Locked,disabled; Unlocked,automaticInService) from the
Admin State column for the port being tested.
Step 8 Click Apply.
Step 9 Click Ye s in the confirmation dialog box.
Step 10 Complete the “Test the FMEC” procedure on page 1-12.
Test the FMEC
Step 1 Remove and reinstall the FMEC card to ensure a proper seating:
a. Unscrew the screws on the FMEC cover and pull the cover forward.
b. Loosen the faceplate screws that hold the FMEC card in place.
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