Cisco ONS 15454 Troubleshooting Manual page 57

Chapter 1 General Troubleshooting
Complete the
Step 7
Port" procedure on page
1.5.7 Perform a Terminal Loopback on a Destination Node OC-N, G-Series,
MXP, or TXP Port
The terminal loopback at the destination node 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. The example in
intermediate node destination OC-N port.
Figure 1-27 Terminal Loopback on a Destination Node OC-N Port
Source
ONS Node
OC-N
Test Set
Caution Performing a loopback on an in-service circuit is service-affecting.
Create the Terminal Loopback on a Destination Node OC-N, G-Series, MXP, or TXP Port
This procedure does not apply to Software R4.6 E-Series Ethernet, ML-Series Ethernet, and DWDM
Note
cards.
Connect an optical test set to the port you are testing:
Step 1
Note
a.
b.
c.
November 2004
1.5.7 Perform a Terminal Loopback on a Destination Node OC-N, G-Series, MXP, or TXP Port
"Perform a Terminal Loopback on a Destination Node OC-N, G-Series, MXP, or TXP
1-57.
XC OC-N
Refer to the manufacturer's instructions for detailed information about connection and setup of
the optical test set.
If you just completed the "Perform a Facility (Line) Loopback on a Destination-Node OC-N,
G-Series, MXP, or TXP Port" procedure on page
source 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.
Adjust the test set accordingly.
Figure 1-27
Intermediate
ONS Node
OC-N XC OC-N
1-54, leave the optical test set hooked up to the
Cisco ONS 15454 Troubleshooting Guide, R4.6
shows a terminal loopback on an
Destination
ONS Node
OC-N XC OC-N
1-57