System Description

MCIL -WIPLL-SDN_R2_00 Marconi Communications Ltd. 5-1 of 5-8
BSDUBSDU
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 Hop-
synchronization, power alarms, etc.
-T RJ45
-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
DB15 connectors for connecting to each of the BSRs, cables and connectors for
Chapter
5