EXFO FTBx-9110 - Page 20

Introducing the Optical Switch
14 Optical Switch
Basic Switching Principles
The FTBx-9150 (2  4 model) is also a bidirectional switch. As illustrated in
the following figure, it can be set to six positions. In three of these
positions, one or both input channels do not transmit light to output ports.
I1
I2
I1
I2
2 x 4 Optical Switch Principle
No continuity - Both ports No continuity - Port C1
No continuity - Port C2
C1
C2
L2
L1
L4
C2
L2
L3
C1
L3
L2
L1
C1
C2
L2
L1
C1
C2
L2
L1
C1
C2
L2
L1
C1
C2
L1
L3
L3
L3L3
L4
L4
L4
L4
L4