Cisco ONS 15454 - Test and Clear the DS-3, DS3 N-12, DS3 i-N-12, or EC-1 Port Facility Loopback Circuit; Create the Facility Loopback on the Source DS3 E or DS3 XM Port

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Cisco ONS 15454 Troubleshooting Guide, R8.5
November 2009
Chapter 1 General Troubleshooting
1.2.5 Perform a Facility Loopback on a Destination-Node Electrical Port (East to West)
Step 7 Click Apply.
Step 8 Click Yes in the confirmation dialog box.
Note It is normal for a “LPBKFACILITY (DS1, DS3)” condition on page 2-169 to appear during
loopback setup. The condition clears when you remove the loopback.
Step 9 Complete the “Test and Clear the DS-3, DS3N-12, DS3i-N-12, or EC-1 Port Facility Loopback Circuit”
procedure on page 1-29.
Test and Clear the DS-3, DS3N-12, DS3i-N-12, or EC-1 Port Facility 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 loopback.
Double-click the card to open the card view.
Step 4 Click the Maintenance > Loopback tabs.
Step 5 Choose None from the Loopback Type column for the port being tested.
Step 6 Choose the appropriate state (IS; OOS,DSBLD; OOS,MT; IS,AINS) from the Admin State column for
the port being tested.
Step 7 Click Apply.
Step 8 Click Yes in the confirmation dialog box.
Step 9 Complete the “Test the Electrical Cabling” procedure on page 1-30.
Create the Facility Loopback on the Source DS3E or DS3XM Port
This procedure applies to DS3E, DS3XM-6, and DS3XM-12 cards. It does not utilize the DS3XM card
FEAC loopback functions. For FEAC information, refer to the “1.3 Troubleshooting DS3XM-6 or
DS3XM-12 Card Electrical Paths With FEAC Loopbacks” section on page 1-45.
Step 1 Connect an electrical test set to the port you are testing.
Use appropriate cabling to attach the Tx and Rx terminals of the electrical test set to the EIA connectors
or DSx panel for the port you are testing. The Tx and Rx terminals connect to the same port. Adjust the
test set accordingly. (Refer to manufacturer instructions for test-set use.)
Step 2 In CTC node view, double-click the card to open the card view.
Step 3 For any of these cards, click the Maintenance > DS3 tabs.
Note The DS-3 Admin State is the basis of the DS-1 Derived State.