Cisco ONS 15454 DWDM Manual page 65

Chapter 1 General Troubleshooting
1.12.1 Fiber Cut Detection
Figure 1-25 Network View Fault Condition for Fiber Cut with ALS Mode Disabled
In network view (Figure 1-25), only the actual affected fiber becomes gray, whereas the traffic (and OSC
signal as well) on the good fiber is active and fault identification is immediate.
In node view (single-shelf mode) or shelf view (multishelf mode) (Figure 1-26 and Figure 1-27), the alarm
panel of the receiving node (ROADM in this example) reports the LOS (OTS), while the transmitting
node (OLA) reports only an EOC alarm.
Cisco ONS 15454 DWDM Troubleshooting Guide, R7.0.1
1-65
78-17742-02