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Cisco ONS 15310-CL and Cisco ONS 15310-MA Troubleshooting Guide, R7.0
Chapter 1 General Troubleshooting
1.3.2 Perform a Cross-Connect Loopback on the Source OC-N Port
Create the Cross-Connect Loopback on the Source OC-N Port
Step 1 Connect an optical test set to the port you are testing:
a. If you just completed the “1.3.1 Perform a Facility Loopback on a Source-Node OC-N Port”
procedure on page 1-14, leave the optical test set connected to the OC-N port in the source node.
b. If you are starting the current procedure without the optical test set connected to the OC-N port, use
appropriate cabling to attach the Tx and Rx terminals of the optical test set to the port you are
testing.
c. Adjust the test set accordingly.
Step 2 Use CTC to put the circuit being tested out of service:
a. In node view, click the Circuits tab.
b. Click the circuit and then click Edit.
c. In the Edit Circuit dialog box, click the State tab.
d. Choose OOS-MT from the Target Circuit Admin State drop-down list.
e. Click Apply.
f. Click Yes in the confirmation dialog box.
Step 3 Use CTC to set up the cross-connect loopback on the circuit being tested:
a. In node view, double-click the 15310-CL-CTX or CTX2500 to open the card view.
b. For the OC-N port, click the Maintenance > Optical > Loopback > SONET STS tabs.
c. Click the check box in the XC Loopback column for the port being tested.
d. Click Apply.
e. Click Yes in the confirmation dialog box.
Step 4 Continue with the “Test the Cross-Connect Loopback Circuit” procedure on page 1-16.
Test the Cross-Connect Loopback Circuit
Step 1 If the test set is not already sending traffic, send test traffic on the loopback circuit.
Step 2 Examine the test traffic received by the test set. Look for errors or any other signal information that the
test set is capable of indicating.
Step 3 If the test set indicates a good circuit, no further testing is necessary with the cross-connect. Clear the
cross-connect loopback:
a. In card view, click the Maintenance > Optical > Loopback > SONET STS tabs.
b. Uncheck the check box in the XC Loopback column for the circuit being tested.
c. Click Apply.
d. Click Yes in the confirmation dialog box.