Cisco ONS 15454 DWDM - Figure 16-33 4 MD-XX.X Faceplate

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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
The 4MD-xx.x has the following features implemented inside a plug-in optical module:
• Passive cascade of interferential filters perform the channel multiplex/demultiplex function.
• Software-controlled VOAs at every port of the multiplex section regulate the optical power of each
multiplexed channel.
• Software-monitored photodiodes at the input and output multiplexer and demultiplexer ports for
power control and safety purposes.
• Software-monitored “virtual photodiodes” at the common DWDM output and input ports. A “virtual
photodiode” is a firmware calculation of the optical power at that port. This calculation is based on
the single channel photodiode reading and insertion losses of the appropriated paths.
Figure 16-33 shows the 4MD-xx.x faceplate.
Figure 16-33 4MD-xx.x Faceplate
4MD
-X.XX
FAIL
ACT
SF
RX
15xx.xx
TX
RX
15xx.xx
TX
RX
15xx.xx
TX
RX
15xx.xx
TX
RX
COM
TX
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