Create The Terminal (Inward) Loopback On A Source Ds-N Port - Cisco ONS 15454 Troubleshooting Manual

Chapter 1 General Troubleshooting

Create the Terminal (Inward) Loopback on a Source DS-N Port

Connect an electrical test set to the port you are testing:
Step 1
a.
b.
c.
In CTC node view, click the Circuits tab and click Create.
Step 2
In the Circuit Creation dialog box, choose the type and size, such as an STS-1.
Step 3
Click Next.
Step 4
In the next Circuit Creation dialog box, give the circuit an easily identifiable name such as
Step 5
"DS-NtoDS-N."
Leave the Bidirectional check box checked.
Step 6
Click Next.
Step 7
In the Circuit Creation source dialog box, select the Node, card Slot, Port, and STS (or VT) where the
Step 8
test set is connected.
Click Next.
Step 9
In the Circuit Creation destination dialog box, use the same Node, card Slot, Port, and STS (or VT) used
Step 10
for the source dialog box.
Click Finish.
Step 11
Confirm that the newly created circuit appears in the Dir column as a 2-way circuit.
Step 12
Note
Note
Step 13 Create the terminal (inward) loopback on the destination port being tested:
a.
b.
c.
d.
November 2004
If you just completed the "Perform a Hairpin Test on a Source Node Port (West to East)" procedure
on page 1-12, leave the electrical test set hooked up to the DS-N port in the source node.
If you are starting the current procedure without the electrical test set hooked up to the DS-N port,
use appropriate cabling to attach the Tx and Rx terminals of the electrical test set to the DSx panel
or the EIA connectors for the port you are testing. Both Tx and Rx connect to the same port.
Adjust the test set accordingly.
It is normal for the "LPBKTERMINAL (DS1, DS3, EC-1-12, OCN)" condition on page 2-144
to appear during a loopback setup. The condition clears when you remove the loopback.
DS-3 terminal loopbacks do not transmit a DS-3 AIS (see the
the direction away from the loopback. Instead of a DS-3 AIS, a continuance of the signal
transmitted to the loopback is provided.
Go to the node view of the destination node:
Choose View > Go To Other Node from the menu bar.
•
Choose the node from the drop-down list in the Select Node dialog box and click OK.
•
In node view, double-click the card that requires the loopback, such as the DS-N card in the
destination node.
Depending upon the card type, click the Maintenance > Loopback tabs, Maintenance > DS1 tabs,
or Maintenance > DS3 tabs.
Select OOS_MT from the State column. If this is a multiport card, select the row appropriate for
the desired port.
1.3.8 Perform a Terminal (Inward) Loopback on a Source DS-N Port (East to West)
Cisco ONS 15454 Troubleshooting Guide, R4.6
"AIS" condition on page 2-21) in
1-33