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Cisco ONS 15454 SDH Troubleshooting Guide, R5.0
July 2005
Chapter 1 General Troubleshooting
1.2.5 Perform a Facility (Line) Loopback on a Destination-Node Electrical Port (East to West)
Step 3 If the test set indicates a good circuit, the problem is 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
TAC numbers for your country.
Step 4 Replace the faulty card. Complete the “Physically Replace a Traffic Card” procedure on page 2-271 for
the faulty card.
Step 5 Double-click the card to display the card view.
Step 6 Click the Maintenance > Loopback tabs.
Step 7 Choose None from the Loopback Type column for the port being tested.
Step 8 Choose the appropriate state (Unlocked; Locked,disabled; Unlocked,automaticInService) from the
Admin State column for the port being tested.
Step 9 Click Apply.
Step 10 Click Yes in the confirmation dialog box.
Step 11 Complete the “Test the FMEC” procedure on page 1-27.
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.
c. Pull the FMEC card outward by the faceplate to unseat it from the shelf assembly.
d. Push the FMEC card back inward by the faceplate to reseat it in the shelf assembly.
Step 2 Resend test traffic on the loopback circuit with known-good cabling, a known-good card, and the
reinstalled FMEC card. If the test set indicates a good circuit, the problem is probably an improperly
seated FMEC card.
Step 3 Clear the facility (line) loopback:
a. Click the Maintenance > Loopback tabs.
b. Choose None from the Loopback Type column for the port being tested.
c. Choose the appropriate state (Unlocked; Locked,disabled; Unlocked,automaticInService) from the
Admin State column for the port being tested.
d. Click Apply.
e. Click Yes in the confirmation dialog box.
The entire electrical circuit path has now passed its comprehensive series of loopback tests. This circuit
qualifies to carry live traffic.
Step 4 If the test set indicates a faulty circuit, the problem is probably the defective FMEC card. Return the
defective FMEC 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
TAC numbers for your country.
Step 5 Complete the “Physically Replace a Traffic Card” procedure on page 2-271 for the faulty FMEC card.
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