Specifications

5-5
Cisco ONS 15530 Planning Guide
OL-7708-01
Chapter 5 Amplified Network Planning
VOA Modules
Figure 5-4 Optical Seam Example
WB-VOA Modules
The Cisco ONS 15530 supports two types of WB-VOA modules: single and dual. A single WB-VOA
module accepts an optical signal and attenuates all frequencies within that signal. The signal can contain
a single channel, such as the OSC, a band of channels, or the entire trunk signal.
A dual WB-VOA module consists of two WB-VOA units combined into a single module. Each WB-VOA
unit accepts an optical signal and attenuates all frequencies within that signal. The two WB-VOA units
function independently of each other. The dual WB-VOA module provides more attenuator ports when
space in a shelf is limited.
Table 5-2 lists the optical specifications for the WB-VOA modules.
Unconnected upgrade ports
TrunkTrunk
99552
PB-OE (band C)
PB-OE (band B)
Upgrade
out
Upgrade
in
West
OADM
module
East
OADM
module
Table 5-2 WB-VOA Optical Specifications
Specification Single WB-VOA Dual WB-VOA
Maximum attenuation 30 dB 30 dB
Minimum attenuation resolution 0.1 dB 0.1 dB
Minimum attenuation 1.7 dB 1.7 dB