Cisco ONS 15327 User Documentation page 375

Chapter 12 Maintenance
Procedure: Create the Terminal Loopback on a Destination XTC Card
Connect an electrical test set to the port you are testing:
Step 1
•
•
Step 2 Use CTC to set up the source loopback circuit on the port being tested.
Use CTC to set up the terminal loopback circuit on the port being tested.
Step 3
Confirm that the newly created circuit appears on a Circuits screen row with a direction column that
Step 4
shows a 2-way circuit.
Note
Note
Proceed to the
Step 5
page
Procedure: Test the Terminal Loopback Circuit on the Destination XTC Card
If the test set is not already sending traffic, send test-set traffic on the loopback circuit.
Step 1
Examine the test traffic being received by the test set. Look for errors or any other signal information
Step 2
that the test set is capable of indicating.
If the test set indicates a good circuit, no further testing is necessary on the loopback circuit. Proceed to
Step 3
the
If the test set indicates a faulty circuit, the problem may be a faulty card. Proceed to the
Step 4
Destination XTC Card" procedure on page
June 2002
If you are starting the current procedure with the electrical test set hooked up to the MIC card in the
source node, leave the test set hooked up.
If you are starting the current procedure without the electrical test set hooked up to the MIC card,
use appropriate cabling to attach the transmit (Tx) and receive (Rx) terminals of the electrical test
set to the MIC connectors for the port you are testing. Both transmit (Tx) and receive (Rx) connect
to the same port.
Loopbacks operate only on in-service ports.
It is normal for an alarm to appear during a loopback setup. The alarm clears when you
remove the loopback.
"Test the Terminal Loopback Circuit on the Destination XTC Card" procedure on
12-29.
"Perform a Facility Loopback on a Destination XTC Card" procedure on page
12-30.
Cisco ONS 15327 User Documentation, R3.3
Network Test Procedures
12-30.
"Test the
12-29