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Chapter 1
General Troubleshooting
Create the Hairpin Circuit on the Destination-Node Port
Connect an electrical test set to the port you are testing:
Step 1
a.
b.
Adjust the test set accordingly.
Step 2
Use CTC to set up the hairpin circuit on the test port:
Step 3
a.
b.
c.
d.
e.
f.
g.
h.
i.
j.
k.
l.
m.
Confirm that the newly created circuit appears on the Circuits tab and that the Dir column describes it
Step 4
as a one-way circuit.
Step 5
Complete the
Test and Delete the Electrical Hairpin 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 received by the test set. Look for errors or any other signal information that the
test set is capable of indicating.
July 2005
If you just completed the
"1.2.5 Perform a Facility (Line) Loopback on a Destination-Node
Electrical Port (East to West)" procedure on page
electrical port in the destination node.
If you are starting the current procedure without the electrical test set hooked up to the electrical
port, use appropriate cabling to attach the Tx and Rx terminals of the electrical test set to the
electrical connection panel or the FMEC connectors for the port you are testing. The Tx and Rx
terminals connect to the same port.
In node view, click the Circuits tab and click Create.
In the Circuit Creation dialog box, choose the type and size, such as VC HO Path Circuit, and
number, such as 1.
Click Next.
In the next Circuit Creation dialog box, give the circuit an easily identifiable name such as Hairpin1.
Uncheck the Bidirectional check box. Leave the default value for State, SD Threshold, and
SF Threshold.
Click Next.
In the Circuit Creation source dialog box, select the same Node, Slot, Port, VC, and Tug where the
test set is connected. Leave Use Secondary Source unchecked.
Click Next.
In the Circuit Creation destination dialog box, use the same Node, Slot, Port, VC, and Tug used for
the source dialog box. Leave Use Secondary Destination unchecked.
Click Next.
In the Circuit Creation circuit routing preferences dialog box, leave all defaults.
If the VC Optimization dialog box appears, leave all defaults.
Click Finish.
"Test and Delete the Electrical Hairpin Circuit" procedure on page
1.2.6 Perform a Hairpin Test on a Destination-Node Electrical Port (East to West)
1-24, leave the electrical test set hooked up to the
Cisco ONS 15454 SDH Troubleshooting Guide, R5.0
1-29.
1-29
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