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Cisco ONS 15454 DWDM Engineering and Planning Guide, Release 7.x
July 2006
Chapter 2 Cards Specifications
2.2.5 Dispersion Compensation Units
Figure 2-11 OPT-AMP-L Card Functional Block Diagram
The card faceplate shows the 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.
Table 2-27 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
P
Physical 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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