Cisco ONS 15454 DWDM Manual page 67

Chapter 1 General Troubleshooting
Figure 1-27
In order to troubleshoot and eventually fix a fiber cut, follow the
page
before the alarm condition occurred. For first installation or restart from a fiber cut, refer to
1.12.2 System Restart after a Fiber Cut, page
Fix a Fiber Cut
When the network ALS setting is DISABLE, optical power is still present at the damaged fiber. Before
Caution
fixing the span, it is highly recommended that you shut down the amplifier and the OSC laser upstream
of the fiber cut.
Isolate the span affected by the fiber cut.
Step 1
a.
b.
Verify the alarm is valid, then perform the following steps for both DWDM nodes connected to the span
Step 2
identified in
a.
78-17742-02
ONS 15454 SDH OLA Node View with Fault Condition for ALS MODE Disabled
1-67. The basic assumption is that the MSTP system was already installed and working correctly
Go to CTC network view.
Identify the span connection that is gray.
Step 1.
Double-click the card directly connected to the span (either the OPT-BST or the OSC-CSM).
"Fix a Fiber Cut" procedure on
1-69.
Cisco ONS 15454 DWDM Troubleshooting Guide, R7.0.1
1.12.1 Fiber Cut Detection
1-67