User's Manual

38 RT System 2 v2.3 Deployment Guide R01.i

3. Backhaul

Backhaul Components

3.2.1 LIU

The data transmitted by the WRUs is collected by the Line Interface Unit (LIU). The LIU acts

as the interface between the network of WRUs and the backhaul equipment. The LIU has an

Ethernet port that can be connected directly to a computer, or more commonly, to an

armored fiber optic cable or a backhaul radio. Backhaul radios operate in the 5.8 GHz band.

A second array of WRUs can be deployed on the other side of the LIU, symmetrically or

asymmetrically around the LIU. The LIU is shown in the following figure:

Before the Central Software System can communicate with the LIU, you must set up the

backhaul.

Figure 3–7 Line Interface Unit (LIU)

NOTE

See “D. LED Indicators” on page 163 for an explanation of the LED status and

error conditions.