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Chapter 1
General Troubleshooting
In the Circuit Creation destination dialog box, use the same Node, Slot, Port, VC, and Tug used for the
Step 11
source dialog box.
Step 12
Click Next and complete the following substeps:
a.
b.
c.
Confirm that the newly created circuit appears in the Dir column as a two-way circuit.
Step 13
Note
Note
Step 14
Create the terminal (inward) loopback on the destination port being tested:
a.
b.
c.
d.
e.
f.
g.
Complete the
Step 15
page
Test and Clear the Electrical Port Terminal (Inward) 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 being 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 on the loopback circuit.
Double-click the electrical card in the destination node with the terminal loopback.
Click the Maintenance > Loopback tabs.
Step 4
July 2005
1.2.8 Perform a Terminal (Inward) Loopback on a Source-Node Electrical Port (East to West)
In the Circuit Creation circuit routing preferences dialog box, leave all defaults.
In the VC Optimization dialog box, leave all defaults.
Click Finish.
It is normal for a
"LPBKTERMINAL (DS3)" condition on page 2-171
loopback setup. The condition clears when you remove the loopback.
Electrical circuit terminal loopbacks do not transmit an AIS (see the
page
2-30) in the direction away from the loopback. Instead of a, electrical line AIS, a
continuance of the signal transmitted to the loopback is provided.
Go to the node view of the destination node:
•
From the View menu choose Go To Other Node.
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 electrical card in the
destination node.
Click the Maintenance > Loopback tabs.
Select Locked,maintenance from the Admin State column. If this is a multiport card, select the row
appropriate for the desired port.
Select Terminal (Inward) from the Loopback Type column. If this is a multiport card, select the
row appropriate for the desired port.
Click Apply.
Click Yes in the confirmation dialog box.
"Test and Clear the Electrical Port Terminal (Inward) Loopback Circuit" procedure on
1-37.
Cisco ONS 15454 SDH Troubleshooting Guide, R5.0
to appear during a
"AIS" condition on
1-37
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