User Manual

1QDF10134AAP-SYD-FCC Issue 03
Draft 05
5-1 of 5-4
BSDU
5.1. Base Station Distribution Unit
The Base Station Distribution Unit (BSDU) is a major building block of the base
station. It performs the main indoor functions of the WipLL base-station. This
mainly refers to the interfacing function between the Base Station Radios (BSRs),
the Wide Area Network (WAN) and the DC power system.
Figure 5-1: The WipLL BSDU
The functions implemented by the BSDU in the WipLL system's base station are:
 Data switching. - between 6 BSRs to a fast Ethernet 100Base-T port.

Power distribution - DC power from a single -48Vdc connection to six BSRs.
 Domestic functions - focusing on local functions of the base station such as
frequency hopping, power alarms, etc.
The BSDU is a 19" rack mount device. The front fascia has 2 × 100Base-T RJ45
sockets, 2 × 10Base-T RJ45 sockets, Sync in and Sync out RJ45 sockets, a DB9
socket for a monitor and a DB9 socket for management. The rear of the device has 6
Chapter
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