Cisco ONS 15454 Troubleshooting Manual page 41

Chapter 1 General Troubleshooting
Figure 1-22 Terminal (Inward) Loopback on a G-Series Port
4 ports
GigE
GBIC 1 SERDES
GBIC 2 SERDES
GBIC 3 SERDES
GBIC 4 SERDES
Performing a loopback on an in-service circuit is service-affecting.
Caution
Create the Terminal (Inward) Loopback on a Source Node Port
Note This procedure does not apply to Software R4.6 E-Series Ethernet, ML-Series Ethernet, and DWDM
cards.
Step 1 Connect an optical test set to the port you are testing:
Note
a.
b.
c.
November 2004
1.5.2 Perform a Terminal (Inward) Loopback on a Source-Node OC-N, G-Series, MXP, or TXP Port
GigE
MAC
GigE
MAC
GigE
MAC
GigE
MAC
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 Source-Node G-Series, MXP,
OC-N, or TXP Port" procedure on page
G-Series, MXP, or TXP port in the source node.
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.
Processor Subsystem
Terminal
Loopback
Path
FPGA
Termination
Block
Block
Facility
Loopback
1-38, leave the optical test set hooked up to the OC-N,
Cisco ONS 15454 Troubleshooting Guide, R4.6
Protect
RX BPIA
Protect
TX BPIA
BACKPLANE
BTC
STS48
192
Main
RX BPIA
Main
TX BPIA
1-41