Create A Terminal Loopback On Intermediate-Node Optical Ports; Figure 1-10 Terminal Loopback On An Intermediate-Node Stm-N Port - Cisco ONS 15600 SDH Troubleshooting Manual

1.2.5 Perform a Terminal Loopback on an Intermediate-Node Optical Port
Figure 1-10 Terminal Loopback on an Intermediate-Node STM-N Port
Source
ONS Node
STM-N
Test Set
STM-N cards placed in facility loopback state display an icon, shown in
Figure 1-11
Performing a loopback on an in-service circuit is service-affecting.
Caution
Terminal loopbacks require on-site personnel.
Note
Complete the
page

Create a Terminal Loopback on Intermediate-Node Optical Ports

Step 1 Connect an optical test set to the port you are testing:
Note
a.
b.
Adjust the test set accordingly. (Refer to manufacturer instructions for test-set use.)
Step 2
Use CTC to set up the terminal loopback on the test port:
Step 3
a.
b.
c.
Cisco ONS 15600 SDH Troubleshooting Guide, R8.0
1-20
XC STM-N
Facility Loopback Indicator
"Create a Terminal Loopback on Intermediate-Node Optical Ports" procedure on
1-20.
For specific procedures to connect, set up, and use the test set equipment, consult the
manufacturer.
If you just completed the "1.2.4 Perform a Facility Loopback or Payload Loopback on an
Intermediate-Node Optical Port" section on page
source-node port.
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.
In node view, click the Circuits tab and click Create.
In the Circuit Creation dialog box, choose the type, such as VC_HO_PATH_CIRCUIT, and circuit
number, such as 1.
Click Next.
Intermediate
ONS Node
STM-N XC STM-N
1-16, leave the optical test set hooked up to the
Chapter 1 General Troubleshooting
Destination
ONS Node
STM-N XC STM-N
Figure 1-11.
July 2010