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1.2.2 Perform a Hairpin Test on a Source-Node Electrical Port (West to East)
Figure 1-12
Test Set
The ONS 15454 SDH does not support simplex operation on the XC-VXL cross-connect card. Two
Note
cross-connect cards of the same type must be installed for each node.
Complete the
Create the Hairpin Circuit on the Source-Node Electrical Port
Connect an electrical test set to the port you are testing:
Step 1
a.
b.
Step 2
Adjust the test set accordingly.
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.
Cisco ONS 15454 SDH Troubleshooting Guide, R5.0
1-14
Hairpin on a Source-Node Port
Source
ONS Node
E1N
"Create the Hairpin Circuit on the Source-Node Electrical Port" procedure on page
If you just completed the
"1.2.1 Perform a Facility (Line) Loopback on a Source Electrical Port
(West to East)" procedure on page
electrical port.
If you are starting the current procedure without the electrical test set hooked up to the source port,
use appropriate cabling to attach the Tx and Rx terminals of the electrical test set to the electrical
connection panel or the FMEC card 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
of circuits, such as 1.
Click Next.
In the next Circuit Creation dialog box, give the circuit an easily identifiable name such as Hairpin1.
Choose the Size, such as VC4.
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 Circuit Source dialog box. Leave Use Secondary Destination unchecked.
In the Circuit Creation circuit routing preferences dialog box, leave all defaults.
XC
STM-N
1-10, leave the electrical test set hooked up to the source-node
Chapter 1
General Troubleshooting
Destination
ONS Node
STM-N
XC
E1N
1-14.
July 2005
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