7-21
Cisco ONS 15454 DWDM Reference Manual, R8.5
78-18343-02
Chapter 7      Reconfigurable Optical Add/Drop Cards
7.4.2    32WSS-L Block Diagram
Figure 7-10 32WSS-L Block Diagram
Aggregate optical signals that enter the EXP RX and COM RX ports are processed in two ways: add 
channel/pass-through and optical splitter processing. The optical processing stages are shown in 
Figure 7-11, which provides a detailed optical functional diagram of the 32WSS-L card.
EXP RX port
(In from other 32WSS-L
within the network element)
EXP TX port
(To the other 32WSS-L
within the network element)
DROP TX port
dropped channels
(To COM RX port
of 32DMX)
COM RX port
(In from OPT-AMP-L preamplifier
or OSC-CSM)
COM TX port
(To o OPT-AMP-L booster
or OSC-CSM) 
134971
32 add ports
Add 1 Add 2 Add 32
Optical
splitter
Add channel
or pass-through
Wavelength
selective switch