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Cisco ONS 15600 SDH Troubleshooting Guide, R8.0
July 2010
Chapter 1 General Troubleshooting
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
STM-N cards placed in facility loopback state display an icon, shown in
Figure 1-11
Facility Loopback Indicator
Caution
Performing a loopback on an in-service circuit is service-affecting.
Note
Terminal loopbacks require on-site personnel.
Complete the
“Create a Terminal Loopback on Intermediate-Node Optical Ports” procedure on
Create a Terminal Loopback on Intermediate-Node Optical Ports
Step 1
Connect an optical test set to the port you are testing:
Note
For specific procedures to connect, set up, and use the test set equipment, consult the
manufacturer.
a.
If you just completed the
“1.2.4 Perform a Facility Loopback or Payload Loopback on an
Intermediate-Node Optical Port” section on page 1-16
, leave the optical test set hooked up to the
source-node port.
b.
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.
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
.
Destination
ONS Node
STM-N
STM-N
XC
Source
ONS Node
Intermediate
ONS Node
STM-N
Test Set
STM-N
XC
STM-N
STM-N
XC
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Содержание Cisco ONS 15600 SDH
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