Alvarion SW VERSION 5.1 system manual Modular Base Station Equipment

Chapter 1 - System Description

1.2Base 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 Provider.

There are 2 lines of Access Units with different architectures:

„Modular Base Station Equipment

„Standalone “Micro-Cell” Access Unit

1.2.1Modular 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 equipment

using GFSK modulation, including BreezeACCESS II, BreezeACCESS MMDS, 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 VL modules: 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 BreezeACCESS VL Access Units, and a different power supply module, suitable for GFSK equipment, is required for powering the BreezeACCESS GFSK Access Units.

Each BS-AU module and its outdoor radio unit (AU-ODU) comprise an AU-E-BS Access Unit that together with an external antenna serves a single sector. There are two types of Access Units, differing in the maximum number of Subscriber Units that they can serve:

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BreezeACCESS VL System Manual