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Cisco ONS 15600 SDH Troubleshooting Guide, R8.0
July 2010
Chapter 1 General Troubleshooting
1.2.7 Perform a Terminal Loopback on a Destination-Node Optical Port
Step 7
Complete the
“1.2.7 Perform a Terminal Loopback on a Destination-Node Optical Port” procedure on
1.2.7 Perform a Terminal Loopback on a Destination-Node Optical Port
The terminal loopback at the destination-node ASAP card optical port is the final local hardware error
elimination in the circuit troubleshooting process. If this test is completed successfully, you have verified
that the circuit is good up to the destination port.
Caution
Performing a loopback on an in-service circuit is service-affecting.
Note
STM-16 and STM-64 cards are not capable of terminal loopbacks.
Note
Terminal loopbacks require on-site personnel.
Complete the
“Create the Terminal Loopback on a Destination-Node Optical Port” procedure on
Create the Terminal Loopback on a Destination-Node Optical Port
Step 1
Connect an optical test set to the ASAP card optical port you are testing: If you are starting the current
procedure without the optical test set hooked up to the source port, use appropriate cabling to attach the
Tx and Rx terminals of the optical test set to the port you are testing. Both Tx and Rx connect to the
same port.
Note
For specific procedures to use the test set equipment, consult the manufacturer.
Step 2
Adjust the test set accordingly. (Refer to manufacturer instructions for test-set use.)
Step 3
Use CTC to set up the terminal loopback on the test port:
a.
In node view, click the
Circuits
tab and click
Create
.
b.
In the Circuit Creation dialog box, choose the type, such as VC_HO_PATH_CIRCUIT, and circuit
number, such as 1.
c.
Click
Next
.
d.
In the next Circuit Creation dialog box, give the circuit an easily identifiable name such as
Opt1toOpt6.
e.
Leave the Bidirectional check box checked.
f.
Click
Next
.
g.
In the Circuit Creation source dialog box, select the same Node, card Slot, Port, and VC where the
test set is connected.
h.
Click
Next
.
Содержание Cisco ONS 15600 SDH
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