System Operation
2-12
InterReach Unison Installation, Operation, and Reference Manual
CONFIDENTIAL
D-620003-0-20 Rev J
2.4
System Operation
Figure 2-8
Downlink (Base Station to Wireless Devices)
Figure 2-9
Uplink (Wireless Devices to Base Station)
Main Hub
RAU
The Main Hub receives downlink RF signals
from a base station using coaxial cable.
The Main Hub converts the RF signals to IF, then
to optical signals and sends them to Expansion
Hubs (up to four) using optical fiber cable.
The Expansion Hub converts the optical sig-
nals to electrical signals and sends them to
RAUs (up to eight) using Cat-5/5E/6 ScTP
The RAU converts the IF signals
to RF and sends them to passive
antennas using coaxial cable.
Expansion Hub
Main Hub
RAU
The Main Hub sends
uplink RF signals to a
base station via coaxial
cable.
The Main Hub receives
the optical signals from
the Expansion Hubs (up
to four) via optical fiber
cable and converts
them to RF signals.
The Expansion Hub
receives the IF signals
from the RAUs (up to
eight) via Cat-5/5E/6
ScTP cable and con-
verts them to optical
The RAU receives uplink RF
signals from the passive
antenna via coaxial cable and
converts them to IF signals.
Expansion Hub
