Cisco ONS 15454 SDH Specifications Page 89

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2-9
Cisco ONS 15454 SDH Troubleshooting and Maintenance Guide, R3.3
May 2002
Chapter 2 General Troubleshooting
Identify Points of Failure on a Circuit Path
Procedure: Retest the Original Cross-Connect Card
Step 1 Do a manual switch (side switch) of the cross-connect cards to make the original cross-connect card the
active card.
a. Determine the standby cross-connect card. The ACT/STBY LED of the standby cross-connect card
is amber and the ACT/STBY LED of the active cross-connect card is green.
b. In node view, select the Maintenance > XC Cards tabs.
c. From the Cross Connect Cards menu, choose Switch.
d. Click Yes on the Confirm Switch dialog box.
Step 2 Resend test traffic on the loopback circuit.
Step 3 If the test set indicates a faulty circuit, the problem is probably the defective card.
a. Return the defective card to Cisco through the RMA process. Call the Cisco TAC at 1-800-553-2447
or login to http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml to obtain a directory of
Cisco TAC toll-free numbers for your country to obtain more information to open an RMA case.
b. Replace the defective cross-connect card.
c. Clear the loopback circuit before testing the next segment of the network circuit path.
d. Proceed to the “Perform a Terminal Loopback on a Destination E3-12 Card” section on page 2-9.
Step 4 If the test set indicates a good circuit, the cross-connect card may have had a temporary problem that
was cleared by the side switch.
a. Clear the loopback circuit before testing the next segment of the network circuit path.
b. Proceed to the “Perform a Terminal Loopback on a Destination E3-12 Card” section on page 2-9.
2.2.3 Perform a Terminal Loopback on a Destination E3-12 Card
This test is a terminal loopback performed on the fourth traffic card in the circuit, in the following
example the E3-12 card in the destination node is the test card. First, create a bidirectional circuit that
starts on the source node E3-12 port and terminates on the destination node E3-12 port. Then, proceed
with the terminal loopback test. Completing a successful terminal loopback to a destination node E3-12
card verifies that the circuit is good up to the destination E3-12. Figure 2-8 shows an example of a
terminal loopback on a destination E3-12 card.
Figure 2-8 Terminal loopback on a destination E3-12 card
ONS 15454
Source
ONS 15454
Destination
76176
Test Set
XCE3-12 STM-N E3-12XCSTM-N
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