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Cisco ONS 15327 Troubleshooting Guide, R3.4
April 2003
Chapter 1 General Troubleshooting
Identify Points of Failure on an OC-N Circuit Path
Figure 1-13 Cross-Connect Loopback on a 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” section
on page 1-21, leave the optical test set hooked up to the OC-N port in the source node.
b. If you are starting the current procedure without the optical test set hooked up 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. Both Tx and Rx connect to the same port.
c. Adjust the test set accordingly.
Step 2 Use CTC to put the circuit being tested out of service:
a. In node view, double-click the card where the test set is connected. The card view appears.
b. In card view, click the Provisioning > Line tabs.
c. Choose OOS or OOS_MT from the Status column for the port being tested.
d. Click Apply.
e. 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 card view, click the Provisioning > SONET STS tabs.
b. Click the check box in the XC Loopback column for the port being tested.
c. Click Apply.
d. Click Yes in the confirmation dialog box.
Step 4 Proceed to the “Test the Cross-Connect Loopback Circuit” procedure on page 1-24.
Procedure: 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:
a. Clear the cross-connect loopback:
• In card view, click the Provisioning > SONET STS tabs.
• Uncheck the check box in the XC Loopback column for the circuit being tested.
Destination
ONS Node
OC-N OC-NXC
Source
ONS Node
Intermediate
ONS Node
OC-N OC-NXCOC-N
Test Set
OC-N XC
90643