Specifications

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Cisco ONS 15530 Planning Guide

OL-7708-01

Chapter 5 Amplified Network Planning

VOA Modules

PB-OE Modules

The PB-OE module selects and attenuates one or two specific four-channel bands and passes the

remaining bands to be attenuated by another PB-OE module, by a WB-VOA module, or not attenuated

at all. After the bands are attenuated, they are merged back together and sent out on the trunk fiber. The

Cisco ONS 15530 supports eight single band PB-OE modules (one for each four-channel band) and four

dual band PB-OE modules (for bands AB, CD, EF, and GE).

Table 5-1 lists the optical specifications for the PB-OE modules.

A single band PB-OE module accepts an incoming signal containing more than one band. The band are

split by an optical band filter into two components. One component is attenuated and the other

component can be passed to an another module where it can be attenuated and passed back to the original

PB-OE module. The PB-OE module then recombines the two equalized components and sends it out on

the trunk fiber.

Figure 5-2 shows a logical view of a single band PB-OE module combined with a single WB-VOA

module for pass through band attenuation. You can also combine a PB-OE module with other PB-OE

modules in a cascaded fashion.

Figure 5-2 Single Band PB-OE Module and Single WB-VOA Module Example

If a band pair has to be attenuated, use a dual band PB-OE module. When more than two add bands are

to be attenuated, multiple PB-OE modules and WB-VOA modules can be cascaded. The dual band

PB-OE supports band pairs AB, CD, EF, and GH.

Figure 5-3 shows a logical view of a dual band PB-OE module and single WB-VOA module

combination. The single WB-VOA module attenuates the signal passed out from the dual PB-OE

module.

Table 5-1 PB-OE Optical Specifications

Specification Single Band PB-OE Dual Band PB-OE

Maximum attenuation 30 dB 30 dB

Minimum attenuation resolution 0.1 dB 0.1 dB

Minimum attenuation 3.4 dB 3.9 dB

Maximum pass through loss 2.6 dB 4.8 dB

Single WB-VOA module

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