Figure 14-49 32Wss Optical Block Diagram - Cisco ONS 15454 DWDM Installation And Operation Manual

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Card Reference

Figure 14-49 32WSS Optical Block Diagram

(In from 32WSS)

DROP TX port

The operation of the EX PORT and COM PORT is as follows:

December 2004

1 pass-through

2 pass-through

32 pass-through

EXP RX Port Add Channel/Pass-through Processing

The incoming optical signal is received at the EXP RX port from the other 32WSS module within

the network element. The incoming aggregate optical signal is demultiplexed into its 32 individual

wavelength components, or channels. Then each channel is individually processed by the optical

switch, which does add/pass-through processing. Under software control, the switch either selects

the optical channel coming in from the demultiplexer (the pass-through channel) or it selects the

external ADD channel. If the ADD port channel is selected, the optical signal coming from the

demultiplexer is blocked, and the ADD channel is transmitted in its place.

After the optical switch stage, all of the channels are multiplexed together into an aggregate optical

signal, which is sent out on the COM TX port. The output is typically connected to an OPT-BST (in

the event a booster amplifier is needed) or to an OSC-CSM (if no amplification is needed).

COM RX Port Optical Splitter Processing

The incoming optical signal received at the COM RX port and is applied to the optical splitter within

the 32WSS. Channels that are designated to be dropped are diverted optically to the DROP TX port

by the splitter. The DROP TX port on the 32WSS is typically connected to the COM RX port of the

32DMX where the drop channels are dropped. Channels that are not dropped pass through the

optical splitter and flow out of the EXP TX port of the 32WSS. This optical signal is typically

connected to the other 32WSS module within the network element.

(Add channel or

pass-through)

Cisco ONS 15454 DWDM Installation and Operations Guide, R4.7

(In from OPT-PRE

preamplifier or

14.7.6 32WSS Card