User's Manual

Table Of Contents
Wideband Radio Head Overview
044-05251 Rev A 1-9
Fiber Optic Distribution Networks
Fiber optic networks are setup identically to data networks. WRHs are connected is a star configuration
as illustrated in Figure 1-9. 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
WRHs. By using Wave Division Multiplexers (WDMs) and Optical Splitters (OSPs) in the WRHs, the
distribution net can be built up with a combination of star and daisy-chain connections using double or
single fiber.
Figure 1-9 Fiber Optic Star Configuration
Multi-Operator Configurations
Multi-operator systems require the use of Point of Interconnects (POIs), RF Combining Modules
(RCMs) and OCMs as illustrated in Figure 1-10. 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 WRHs. Additional information is provided in the Fiber Optic Equipment
Operation and Maintenance Manual.
Figure 1-10 Multi-operator System
BMU WRH
WRH
WRH
WRH
BTS
RF
O
p
erator 1
O
p
erator 2
Sector 1
Sector 1
Sector 2
Sector 2
OCM
RCM
RCM
POI
POI
POI
POI