User's Manual Part 1

Introduction Hardware Installation Guide
1-6 Airspan Networks Ltd. 02030311-05
! Subscriber Data Adapter (SDA):
The SDA is implemented at base stations comprised of a single BSR. The SDA
provides the BSR with -48 VDC power supply and Ethernet connectivity to the
provider's backbone. The SDA is installed inside, connected to the BSR with a
CAT-5 cable. For a description of the various SDA models, see Section 1.3.2,
“Subscriber Site”.
! Base Station Distribution Unit (BSDU):
The BSDU is implemented at base stations comprising multiple BSRs. The
BSDU provides BSRs with –48 VDC power supply, connectivity to the
provider's backbone, and frequency hop synchronization. The BSDU is installed
inside, connected to BSRs with CAT-5 cables.
Each BSDU can support up to six BSRs, and up to four BSDUs can be daisy-
chained to support a maximum of 24 BSRs. Therefore, a base station at
maximum configuration can serve up to 3,024 subscribers.
! Base Station Power Supply (BSPS):
The BSPS is an optional WipLL unit that provides AC-to-DC power conversion
and power redundancy to BSDUs.
! Global Positioning System (GPS) antenna:
The GPS antenna is a rugged, self-contained GPS receiver and antenna that
receives a universal GPS satellite clock signal. The GPS connects to the BSDU
and synchronizes frequency hopping of multiple base stations to allow the
WipLL network to operate with the same clock, and eliminating radio frequency
ghosting effects.