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Cisco ONS 15454 DWDM Installation and Operations Guide, R6.0
April 2006
Chapter 16 Card Reference
16.6.4 4MD-xx.x Card
Figure 16-34 shows a block diagram of the 4MD-xx.x card.
Figure 16-34 4MD-xx.x Block Diagram
Figure 16-35 shows the 4MD-xx.x optical module functional block diagram.
Figure 16-35 4MD-xx.x Optical Module Functional Block Diagram
The optical module shown in Figure 16-35 is optically passive and consists of a cascade of interferential
filters that perform the channel multiplexing and demultiplexing functions.
O
tica
Mo
l
hanne
In
ut
4
2
Pro
o
M T
M R
hanne
Out
ut
FP
For
L Bu
mana
emen
L Bu
T
L Bu
T
D
D
onv
rt
Power suppl
in
ut filter
BAT A
98303
Virtual photodiode
COM TX COM RX
Demux
RX channels TX channels
Physical photodiode
Variable optical attenuator
Control
Control
interface
V1
V
Mux
P1 P2 P3 P3
P5 P6 P7 P8
P
V2