1-19
Cisco ONS 15454 Troubleshooting Guide, R8.5
November 2009
Chapter 1 General Troubleshooting
1.2.3 Perform an XC Loopback on a Destination-Node OC-N STS (West to East) Carrying an Electrical Signal
Figure 1-13 XC Loopback on a Destination OC-N Port
Create the XC Loopback on a Destination-Node OCN STS
Step 1 Connect an optical test set to the port you are testing:
Note For specific procedures to connect, set up, and use the test set equipment, consult the
manufacturer.
a. If you just completed the “1.2.2 Perform a Hairpin Test on a Source-Node Electrical Port (West to
East)” procedure on page 1-15, leave the optical test set hooked up to the destination-node port.
b. If you are starting the current procedure without the optical test set hooked up to the destination port,
use appropriate cabling to attach the Tx and Rx terminals of the optical test set to the port you are
testing. The Tx and Rx terminals connect to the same port.
Step 2 Adjust the test set accordingly. (Refer to manufacturer instructions for test-set use.)
Step 3 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 4 Use CTC to set up the XC loopback on the circuit being tested:
a. In node view, double-click the OC-N card to open the card view.
b. Click the Maintenance > Loopback > SONET STS tabs.
c. Click the check box in the XC Loopback column for the port being tested.
d. Check Apply.
e. Click Yes in the confirmation dialog box.
Step 5 Complete the “Test and Clear the XC Loopback Circuit” procedure on page 1-20.
Source
ONS Node
Destination
ONS Node
Test Set
XCDS-N OC-N DS-NXCOC-N
115962
To Next Page
Loading...
