User's Manual

Overview Hardware Installation Guide
1-4 Airspan Networks Inc. 02030311-10
1.2.1. Base Station Radio (BSR)
The BSR is an outdoor radio that is mounted outside on a pole or wall. The BSR
provides a wireless link with subscribers and interfaces with the provider's
backbone. Each BSR can serve up to 251 subscribers in a sector.
The BSR is available in various models. These models differ mainly by:
 Antenna design (providing integral flat-panel antennas, or N-type ports for
attaching third-party external antennas)
 Antenna gain
 Frequency band in which they are configured to operate
The BSR connects to the indoor Ethernet hub/switch by a CAT 5 cable, which
carries the Ethernet signal, frequency hopping synchronization signal, and DC
power. For a Base Station consisting of multiple BSRs, the BSRs connect to the
ASWipLL Base Station Distribution Unit (BSDU). For a Base Station consisting of
a single BSR, the BSR typically connects to the ASWipLL Subscriber Data Adapter
(SDA).
1.2.2. Point-to-Point Radio (PPR)
The PPR device is an outdoor radio similar to the BSR, but implemented in a point-
to-point radio configuration, providing wireless communication with a single remote
subscriber ASWipLL radio (i.e. SPR or IDR).
1.2.3. Base Station Distribution Unit (BSDU)
The BSDU is an Ethernet switch implemented at Base Stations consisting of
multiple BSRs. The BSDU provides 100BaseT interface between the BSRs and the
provider's backbone. The BSDU is also responsible for providing BSRs with –48
VDC power supply and for synchronizing BSDUs, BSRs, and Base Stations (when a
GPS is implemented).
The BSDU is installed indoors in a standard 19-inch cabinet and connects to the
BSRs by standard CAT 5 cables. Each BSDU can service up to six BSRs. In