6-13
Cisco ONS 15454 DWDM Reference Manual, R8.5
78-18343-02
Chapter 6      Optical Add/Drop Cards
6.4    AD-2C-xx.x Card
 • Passive cascade of interferential filters perform the channel add and drop functions.
 • Two software-controlled VOAs in the add section, one for each add port, regulate the optical power 
of inserted channels. 
 • Software-controlled VOAs regulate insertion loss on express channels.
 • VOA settings and functions, photodiode detection, and alarm thresholds are internally controlled.
 • Virtual photodiodes (firmware calculation of port optical power) at the common DWDM output and 
input ports are monitored within the software. 
Figure 6-9 shows the AD-2C-xx.x faceplate.
Figure 6-9 AD-2C-xx.x Faceplate 
For information on safety labels for the card, see the “6.2  Class 1M Laser Product Safety Lasers” 
section on page 6-7.
AD-2C
-X.XX
FAIL
ACT
SF
RX
15xx.xx
TX
RX
15xx.xx
TX
RX
EXP
TX
RX
COM
TX
96474