Cisco ONS 15454 Troubleshooting Manual page 88
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1.2.8 Perform a Terminal Loopback on a Source-Node Electrical Port (East to West)
Note
For the DS3 tab, choose OOS,MT from the Admin State column for the port being tested. If this is a
Step 13
multiport card, select the appropriate row for the port being tested. For the DS1 tab, no state selection is
necessary unless the DS-1 is in service. The loopback/send code cannot be selected for a DS-1 if the
derived state is OOS,DSBLD.
d.
e.
f.
Step 14
Complete the
page
Test and Clear the DS3E or DS3XM Port Terminal Loopback Circuit
If the test set is not already sending traffic, send test 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.
Step 3
Double-click the electrical card in the destination node with the terminal loopback.
Depending upon the card type, click the Maintenance > Loopback tabs, Maintenance > DS1 tabs, or
Step 4
Maintenance > DS3 tabs.
Note
Select None from the Loopback Type column for the port being tested.
Step 5
Step 6
Select the appropriate state (IS; OOS,DSBLD; OOS,MT; IS,AINS) in the Admin State column for the
port being tested.
Click Apply.
Step 7
Click Yes in the confirmation dialog box.
Step 8
Step 9
Clear the terminal loopback:
a.
b.
c.
d.
Complete the
Step 10
Cisco ONS 15454 Troubleshooting Guide, R8.5
1-44
The DS-3 Admin State is the basis of the DS-1 Derived State.
Select Terminal 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 DS3E or DS3XM Port Terminal Loopback Circuit" procedure on
1-44.
The DS-3 Admin State is the basis of the DS-1 Derived State.
Click the Circuits tab.
Choose the loopback circuit being tested.
Click Delete.
Click Yes in the Delete Circuits dialog box. Do not check any check boxes.
"Test the Source Electrical Card" procedure on page
Chapter 1
General Troubleshooting
1-45.
November 2009
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