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Key Features
Figure 1-1
After a protection switch occurs, the number of wavelengths on each fiber changes. In the example, the
number of clockwise wavelengths increases to three, while the number of counter-clockwise
wavelengths decreases to one.
1.3 Key Features
Figure 1-2
Figure 1-2
ONS 15216 EDFA2 Block Diagram
Input
VOA
5VDC
Cisco ONS 15216 EDFA2 Operations Guide
1-2
F I N A L D R A F T - C I S C O C O N F I D E N T I A L
Wavelength Protection Switching
C
B
D
A
Before
shows a block diagram of the ONS 15216 EDFA2.
Flattening
Isolator
Pump
Laser
Control Circuit
Microcontroller
Rx Tx
RS232
B
Gain
Isolator
Filter
Pump
Laser
External Alarms
Chapter 1
Wavelength is rerouted
C
Fiber Cut
D
A
After
Output
Output
Monitor
Applications
78-16033-01
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Table of Contents
Troubleshooting
