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Cisco ONS 15454 DWDM Engineering and Planning Guide, Release 7.x
July 2006
Chapter2 Cards Specifications 2.2.5 Dispersion Compensation Units
Figure 2-11 OPT-AMP-L Card Functional Block Diagram
The card faceplate showsthe optical loss (in dB) of the monitor ports provided by the OPT-AMP-L card.
The OPT-AMP-L is a double-slot card with three LEDs on the faceplate.
2.2.5 Dispersion Compensation Units
Dispersion compensation units (DCUs) are installed in the ONS 15454 dispersion compensation shelf
when optical preamplifier (OPT-PRE or OPT-AMP-L) cards are installed in the DWDM node.
Table2-27 lists the DCUs used with the ONS 15454 DWDM configuration.
MON TX
OSC RX
OSC TX
COM RX
COM TX
MON RX
LINE TX
LINE RX
P1
PPhysical photodiode
Variable optical attenuator
P2 P3
P6
P4
DC TX
DC RX
External Mid-Stage
Loss
OSC
Add
OSC
Drop
P7
P5
Transmit Section
Receive Section
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