User Manual

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C HAPTER

INTRODUCTION TO BACKHAUL

INSTALLATIONS

Chapter overview

This chapter provides an overview of the Expedience system and of the system’s

infrastructure components:

• The base station, which comes in two forms:

• The base transceiver station (BTS)

• The rackmount base station (RMB)

• The access provider (AP) server

• The network switches

The chapter provides an installation overview. It also describes things you need to consider

before installing base stations.

System overview

This section provides a brief overview of the Expedience system, as well as the infrastructure

that network access providers must install. For additional system overview information, refer

to the guide “Getting Started with the Expedience System.”

System overview

NextNet Wireless designed the Expedience system to give small office, home office (SOHO),

and residential subscribers high speed, wireless access to network communication systems,

such as the Internet. The Expedience system is an end-to-end broadband wireless access

system and operates in several frequency ranges.

The system was designed to allow network access providers to re-sell network bandwidth to

ISPs on a wholesale basis. In turn, the ISPs sell access to their subscribers on a retail basis. To

support multiple ISPs on the network, the system uses virtual LAN (VLAN) technology.

The system does not

have a line-of-sight (LOS) requirement between the base station and the

CPEs. The air link between base stations and CPEs functions as an Ethernet bridge carrying

IP/ARP packets. Time division duplex (TDD) and cellular deployment offer you flexibility in

adjusting downlink versus uplink airtime.