Cisco Systems 15530 Single WB-VOA Modules, Dual WB-VOA Modules, Single Band PB-OE Modules

6-3
Cisco ONS 15530 Configuration Guide and Command Reference
78-14227-01, Cisco IOS Release 12.1(10)EV2
Chapter6 Configuring VOA Module Interfaces
About Variable Optical Attenuation
Figure6-2 Types of VOA modules
Single WB-VOA Modules
The single WB-VOA modules accept one signal and attenuate all frequencies within that signal. The
signal can contain a single channel, such as the OSC, a band of channels, or multiple channel bands.
Dual WB-VOA Modules
The dual WB-VOA modules consist of two WB-VOA units that each accepts one signal and attenuates
all frequencies within that signal.
Single Band PB-OE Modules
A single band PB-OE module accepts an incoming signal containing at least two bands, which are split
by an optical filter into two components. The first component is attenuated and the seco nd component is
passed to an another module where it can be attenuated and passe d b ack to t h e ori g inal PB-O E. The
PB-OE then recombines the two equalized components into a single signal and sends it out.
Figure 6-3 below shows enlarged views of a single band PB-OE and single WB-VOA module for pass
band attenuation.
A, B, C, D, E, F, G, H
AB, CD, EF, GH
Single-band module
Add Band A & B
Dual-band module
1 or 2- VOA module
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