Cisco ONS 15454 Troubleshooting Manual page 85

Chapter 1 General Troubleshooting
ONS 15454 DS-3 terminal loopbacks do not transmit an AIS in the direction away from the loopback.
Note
Instead of AIS, a continuance of the signal transmitted into the loopback is provided. A DS3/EC1-48
card can be provisioned to transmit AIS for a terminal loopback if desired.
Depending upon your card type, complete the
DS3N-12, DS3i-N-12, or EC1 Port" procedure on page 1-41
Source DS3E or DS3XM Port" procedure on page
Create the Terminal Loopback on a Source DS-1, DS-3, DS3N-12, DS3i-N-12, or EC1 Port
Connect an electrical test set to the port you are testing:
Step 1
a.
b.
Adjust the test set accordingly. (Refer to manufacturer instructions for test-set use.)
Step 2
In CTC node view, click the Circuits tab and click Create.
Step 3
In the Circuit Creation dialog box, choose the type, such as STS, and number, such as 1.
Step 4
Click Next.
Step 5
In the next Circuit Creation dialog box, give the circuit an easily identifiable name such as DS1toDS4.
Step 6
Step 7 Leave the Bidirectional check box checked.
Click Next.
Step 8
In the Circuit Creation source dialog box, select the Node, card Slot, Port, and STS (or VT) where the
Step 9
test set is connected.
Step 10 Click Next.
Step 11 In the Circuit Creation destination dialog box, use the same Node, card Slot, Port, and STS (or VT) used
for the source dialog box.
c.
d.
Step 12 Confirm that the newly created circuit appears in the Dir column as a two-way circuit.
Note
ONS 15454 DS-3 terminal loopbacks do not transmit an AIS in the direction away from the loopback.
Note
Instead of AIS, a continuance of the signal transmitted into the loopback is provided. A DS3/EC1-48
card can be provisioned to transmit AIS for a terminal loopback if desired.
November 2009
If you just completed the
West) Carrying an Electrical Circuit" procedure on page
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.
Click Next.
In the Circuit Creation circuit routing preferences dialog box, leave all defaults. Click Finish.
It is normal for the "LPBKTERMINAL (DS1, DS3)" condition on page 2-174
a loopback setup. The condition clears when you remove the loopback.
1.2.8 Perform a Terminal Loopback on a Source-Node Electrical Port (East to West)
"Create the Terminal Loopback on a Source DS-1, DS-3,
1-43. Then test and clear the loopback as instructed.
"1.2.7 Perform an XC Loopback on a Source-Node OC-N STS (East to
Cisco ONS 15454 Troubleshooting Guide, R8.5
or the "Create the Terminal Loopback on a
1-36, leave the electrical test set hooked up
to appear during
1-41