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Cisco ONS 15310-CL and Cisco ONS 15310-MA Troubleshooting Guide, R7.0
Chapter1 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
Step1 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.
Step2 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.
Step3 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.
Step4 Continue with the “Test the Cross-Connect Loopback Circuit” procedure on page1-16.
Test the Cross-Connect Loopback Circuit
Step1 If the test set is not already sending traffic, send test traffic on the loopback circuit.
Step2 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.
Step3 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.