Alvarion BreezeACCESS 4900 Specifications Page 31

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Chapter 1 - System Description Base Station Equipment
BreezeACCESS 4900 5 System Manual
1.2 Base Station Equipment
The Access Units, installed at the Base Station site, provide all the functionality
necessary to communicate with the Subscriber Units and to connect to the
backbone of the Service Providers.
There are 2 lines of Access Units with different architectures:
Modular Base Station Equipment
Standalone "Micro-Cell" Access Unit
1.2.1 Modular Base Station Equipment
The Base Station Equipment is based on the BS-SH 3U chassis, which is suitable
for installation in 19-inch racks.
The chassis contains one or two Power Supply modules and has 8 slots that can
accommodate BS-AU Network Interface modules. These slots can also
accommodate various combinations of other modules, including Network
Interface (BS AU) modules for Access Units operating in any of the bands
supported by BreezeACCESS VL equipment or BreezeACCESS equipment using
GFSK modulation, including BreezeACCESS 900, BreezeACCESS II,
BreezeACCESS XL and BreezeACCESS V. It can also accommodate a BS GU GPS
and Alarms module to support GPS-based synchronization of BreezeACCESS
systems using Frequency Hopping radios.
Two different types of power supply modules are available for the BreezeACCESS
4900 chassis: The BS-PS-DC that is powered from a 48 VDC power source, and
the BS-PS-AC, powered from the 110/220 VAC mains. The optional use of two
power supply modules ensures fail-safe operation through power supply
redundancy. When the same chassis is used also for Access Unit modules
belonging to other BreezeACCESS families using GFSK modulation, then one BS
PS power supply (AC or DC) should be used to provide power to the
Figure 1-1: Modular Base Station Equipment
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