User Manual

AS4000 Wireless Local Loop
System Overview GSI 001
605-0000-430
Issue 1.2 Date 7/4/99
Page 1 of 16 © Copyright Airspan Communications Corporation 1999
INTRODUCTION
1 Purpose of Document
The purpose of this document is to familiarise the reader with the features of of the AS4000
Fixed Assignment Wireless Fixed Access System, sufficient to obtain a good, general
understanding of its design, operation, implementation and maintenance principles.
2 Scope of Document
The System Overview document provides an introduction to the product followed by a
description of its features and its design.
3 AS4000 Overview
The AS4000 Wireless Fixed Access System is a digital point to multipoint radio access
system providing wireless access for fixed subscribers to the telecommunication network.
AS4000 delivers telephony, voice band facsimile/data, and leased line Data, providing the
same functionality as “copper pairs” and is therefore a direct alternative to the use of copper
cabling for the delivery of these services to customers.
The system uses Point-to-Multipoint radio links between the individual customer’s premises
and the carriers “local point of presence” as a replacement for the copper pair “local loops
”. The “local point of presence” is typically the Local Exchange premises. If greater
flexibility or range is required, the network radio equipment can be located in another
suitable building or wayside cabinet.
The AS4000 System provides a substitute or replacement for the more traditional copper-
pair local loop. Thus, line plant maintenance costs are eliminated, and digital services can be
rapidly deployed to new residential and business customers.
Each individual customer location is served by one or more 144 kbit/s radio links, which can
be configured to support a range of services, one or two analogue telephony circuits, two
64 kbit/s Data Circuits or ISDN basic rate access.
The telephony (V2) system supports DASS2 and CAS connections to the switched
Network and supports the full range of advanced services supported by this interface,
including CLASS services and Subscriber Pulse Metering (SPM).
The data (D128) system connects to the network using 2Mbit/s G703 HDLC protocol.
For ISDN the host network interconnects to the AS4000 using a 2Mbit/s G.703 interfaces.
The signalling is a Q.931 message based “Euro-ISDN” protocol, that meets the NET.5
ISDN approval standards for Primary Rate Interfaces.
The AS4000 Wireless Fixed Access System provides a single product platform that can
deliver a mixture of dedicated link services. These include: