R01.i RT System 2 v2.3 Deployment Guide 27
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3. Backhaul
Overview
In the RT System 2 system, the LIU communicates with the Central Software System (CSS)
computer in the central recording truck along a backhaul on the
5.8 GHz Industrial, Scientific, and Medical (ISM) radio band. Some smaller systems may not
require a backhaul.
Power over Ethernet
(PoE)
A technology that passes electrical power
along an Ethernet cable. PoE is used where
DC power is not available and USB
unsuitable. Power can be supplied at the end
of a network span or somewhere in the
middle.
PoE switches supply power at the end of a
span. The RT System 2 Line Interface Unit
(LIU) acts as a switch with PoE.
PoE injectors supply power somewhere
between the PoE switch and the powered
device. They inject power and do not affect
the data. A discrete PoE injector is used
when configuring the backhaul radios.
• “Ubiquiti Rocket/Bullet Private
Network Connection” on page
107
• “Ubiquiti NanoStation Private
Network Connection” on page
72
Table 3–1 Backhaul Communication Concepts
Term Definition Reference
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