Cisco ONS 15454 SDH - Create a Facility (Line) Loopback on an Intermediate-Node MXP;TXP;FC_MR Port; Test and Clear the MXP;TXP;FC_MR Port Facility (Line) Loopback Circuit

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Cisco ONS 15454 SDH Troubleshooting Guide, R5.0
July 2005
Chapter 1 General Troubleshooting
1.5.3 Perform a Facility (Line) Loopback on an Intermediate-Node MXP/TXP/FC_MR Port
Create a Facility (Line) Loopback on an Intermediate-Node MXP/TXP/FC_MR Port
Step 1 Connect an optical test set to the port you are testing:
Note Refer to the manufacturer’s instructions for detailed information about connection and setup of
the optical test set.
a. If you just completed the “1.5.2 Perform a Terminal (Inward) Loopback on a Source-Node
MXP/TXP/FC_MR Port” procedure on page 1-84, leave the optical test set hooked up to the
source-node port.
b. If you are starting the current procedure without the optical test set hooked up to the source port
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.
Step 2 Adjust the test set accordingly.
Step 3 In node view, double-click the intermediate-node card that requires the loopback.
Step 4 Click the Maintenance > Loopback tab.
Step 5 Select Locked,maintenance from the Admin State column. If this is a multiport card, select the row
appropriate for the desired port.
Step 6 Select Facility (Line) from the Loopback Type column. If this is a multiport card, select the row
appropriate for the desired port.
Step 7 Click Apply.
Step 8 Click Yes in the confirmation dialog box.
Step 9 Complete the “Test and Clear the MXP/TXP/FC_MR Port Facility (Line) Loopback Circuit” procedure
on page 1-87.
Test and Clear the MXP/TXP/FC_MR Port Facility (Line) Loopback Circuit
Step 1 If the test set is not already sending traffic, send test traffic on the loopback circuit.
Step 2 Examine the 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 facility (line) loopback.
Clear the facility loopback from the port:
a. Click the Maintenance > Loopback tab.
b. Choose None from the Loopback Type column for the port being tested.
c. Choose the appropriate state (Unlocked; Locked,disabled; Unlocked,automaticInService) from the
Admin State column for the port being tested.
d. Click Apply.
e. Click Yes in the confirmation dialog box.
Step 4 Complete the “Test the MXP/TXP/FC_MR Card” procedure on page 1-88.