User's Manual

Overview Nexus FT

1-6 044-05251 Rev C

Fiber Optic Distribution Networks

Fiber optic networks are setup identically to data networks. Nexus FTs are connected in a star configuration as

illustrated in Figure 1-7. In this example, a Base Station Master Unit (BMU) is fed by a BTS via an RF cable. An

Optical Converter Module (OCM) could also be used depending on the system configuration. The BMU or OCM

contain three FONs and provide continuity to the FONs in the four Nexus FTs. By using WDMs and Optical

Splitters (OSPs) in the Nexus FTs, the distribution net can be built up with a combination of star and daisy-chain

connections using double or single fiber.

Figure 1-8 Fiber Optic Star Configuration

Multi-Operator Configurations

Multi-operator systems require the use of Point of Interconnect (POI) units and OCMs as illustrated in Figure

1-8. In this simple example, two operators have two sectors each. Each sector is connected to a POI and then

to a RCM. The RCM is interconnected with an OCM via coaxial cables. The combined DL and UL signals are

converted to optical signals in the OCM and then distributed to the Nexus FTs-V.

Figure 1-9 Multi-operator System

BMU WRH

WRH

BTS

Operator 1

Operator 2

Sector 1

Sector 2

OCM

OCM-POI

BTS-POI

OCM-POI