Airspan AS4000 Installation guide

605-0000-430 © Copyright Airspan Communications Corporation 1999
Issue 1.2 7/4/99
AS4000
Wireless Local Loop System
System Overview

AS4000 Wireless Local Loop
System Overview Preface
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Notice
1. This manual is subject to revision.
2. All rights reserved.
3. Right of modification reserved.
4. This manual is supplied without liability for errors or omissions.
5. No part of this manual may be reproduced or used except as authorised by contract or other
written permission.
6. This equipment is conditioned by the requirement that no modifications will be made to the
equipment unless the changes or modifications are expressly approved by ACC
Communications
7. Prerequisite skills: Personnel installing, commissioning, and maintaining the AS4000 products
must have a basic knowledge of telephony and radio communications, and have experience in
installing, commissioning and maintaining telecommunications products. ACC provides a range
of comprehensive training courses specifically aimed at providing operators/users of AS4000
products with the prerequisite skills to install, commission and or maintain the product. The
courses can be tailored to provide the level of training required by the operator/user.
8. Airspanand Sitespanare Registered Trademarks of Airspan Communications Corporation.
For additional information on Airspan Systems, please call your ACC Representative, or
contact ACC at:
Cambridge House
Oxford Road
Uxbridge
Middlesex
UB8 1UN
Call: (44) 895 4677100

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Safety Instructions - Warnings and Cautions
SAFETY
1. Read and follow all warning notices and instructions marked on the product or included in this
manual
2. Do not allow anything to rest on the power cord and do not locate the product where persons
could step or walk on the power cord.
3. When installed in the final configuration, the product must comply with the applicable Safety
Standards and regulatory requirements of the country in which it is installed. If necessary, consult
with the appropriate regulatory agencies and inspection authorities to ensure compliance.
4. No hazardous RF radiation is emitted from the equipment. Measured at the surface of the
CRU radium, when transmitting, the maximum total power radiated from the CRU is 0.01% of
the UK National Radiological Protection Board basic restriction per kg. of body part.
WARNING - HAZARDOUS VOLTAGES
On AC installations, hazardous voltages exist. Use caution when verifying or working with AC
power. Remove metal jewellery that could come into contact with AC power.
On DC sections, short circuiting the low voltage, low impedance circuits can cause severe arcing
that may result in burns or eye damage. Remove rings, watches etc. to avoid shorting DC circuits.
Electro-Static Discharge ESD
Electro-Static Discharge. Many circuits contain devices which are susceptible to damage from high
impedance voltage sources. To avoid such risks always follow anti-static procedures where
marked.

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NOTE
Airspan products do not contain hazardous substances (as defined in UK ‘Control of Substances
Hazardous to Health Regulations 1989’, and the ‘Dangerous Substances Regulations 1990’). At
the end of any Airspan product’s life cycle, the customer should consult with ACC to ensure that
the product is disposed of in conformance with the relevant regulatory requirements
The Symbol on an Airspan product signifies that it has been certified according to the EMC
directive 89/336/EEC. The product fulfils the requirements according to the following standards:
EN50082-1 for Immunity.
EN55022 Group 1 Class A for the Central Terminal Emissions.
EN55022 Group 1 Class B for the Subscriber Terminal Emissions.
NOTE
The Subscriber Terminal equipment has been tested and found to comply with the limits for a Class
B digital device, pursuant to part 15 of the FCC Rules.

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User Response Form
Mail: Airspan Communications Limited Fax: [phone]
Cambridge House
Oxford Road
Uxbridge
Middlesex
UB8 1UN
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AS4000 Wireless Local Loop
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ISSUE CONTROL LIST
Title Issue Date Issue Details
Title Page 1.2 April 1999 Band name changes
ICL-001 1.2 April 1999
IXL-001 1.2 April 1999
GSI-001 1.2 April 1999
GSI-002 1.2 April 1999
GSI-003 1.2 April 1999
GSI-004 1.2 April 1999

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CHANGE TYPE/DATE PURPOSE PAGES AFFECTED
Issue #, Month Year
1.0
1-7-98
Derived from 152-031-
100 for AS4000
product
All
1.1
2/9/98
1.2
7/4/99
Changes to Band
Descriptions Various

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INDEX TASK LIST
Preface:
Safety Instructions Warnings and Cautions
User Response Form
ACCESS: ICL, IXL
Issue Control List ..................................................................................................ICL-001
Index Task List ....................................................................................................IXL-001
General System Information GSI
Introduction GSI 001
1 Purpose of Document................................................................................................. 1
2 Scope of Document.................................................................................................... 1
3 AS4000 Overview ...................................................................................................... 1
4 VF system .................................................................................................................. 2
5 Data ........................................................................................................................... 3
5.1 Applications of the ST-D128 .................................................................................. 4
5.2 Using Interface Converters......................................................................................4
5.3 Statistical Multiplexer (StatMux) Applications........................................................ 4
5.4 Multiplexer Networks............................................................................................. 4
5.5 Local Area Networks..............................................................................................5
5.6 The Micro-Cellular Application............................................................................... 5
6 ST-I1 ISDN................................................................................................................ 6
6.1 ISDN Terminals...................................................................................................... 6
7 Central Terminal (CT) ................................................................................................ 7
8 Subscriber Terminals (ST) .......................................................................................... 8
8.1 Subscriber Terminal V2 (ST-V2)............................................................................ 8
8.2 Subscriber Terminal D128 (ST-D128)................................................................... 10
8.2.1 The Subscriber Interface................................................................................ 10
8.3 Subscriber Terminal ISDN (ST- I1) ...................................................................... 11

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8.3.1 The Subscriber Interface................................................................................ 11
8.4 Frequency Planning............................................................................................... 11
9 Code Division Multiple Access (CDMA) Overview .................................................. 12
9.1 Spread Spectrum .................................................................................................. 12
9.2 Code Division Multiple Access ............................................................................. 13
10 Litespan-120 (LS-120) Channel Bank....................................................................... 15
Central Terminal Hardware overview GSI 002
1 The Network Interfaces.............................................................................................. 2
2 Antenna and Feeder Sub-system .................................................................................2
2.1 General Description................................................................................................ 2
2.2 Interface Connections ............................................................................................. 3
3 Central Terminal (CT) ................................................................................................ 6
3.1 General Description................................................................................................ 6
3.2 Power Requirements............................................................................................... 7
3.3 CT Equipment Rack Shelves:..................................................................................7
Subscriber Terminal Hardware Overview GSI 003
1 General Description.................................................................................................... 1
1.1 Customer Radio Unit.............................................................................................. 2
1.2 CRU Mounting Bracket..........................................................................................2
1.3 Drop Cable............................................................................................................. 2
1.4 Network Termination Unit (NTU) when using ST-V2............................................. 3
1.5 Network Termination Unit when using ST-D128.................................................... 4
1.6 D128 Interface Converter ....................................................................................... 4
1.7 Network Termination Unit when using ST-I1.......................................................... 4
1.8 AC Power Supply Unit (Type 1)............................................................................. 4
1.9 AC Power Supply Unit (Type 2/4).......................................................................... 5
System Management GSI 004
1 AS8100 Sitespan ........................................................................................................ 1
2 AS8300 Element Manger............................................................................................ 3
2.1.1 EM Interface Specifications............................................................................. 5

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List of Figures
Figures Page
GSI 001
Figure 1. AS4000 System 2
Figure 2. ST-V2 Applications 3
Figure 3. AS4000 using ST-D128 for remote LAN Bridging 5
Figure 4. AS4000 ISDN 6
Figure 5. ISDN Reference Points 7
Figure 6. Central Terminal 8
Figure 7. Subscriber Terminal V2 9
Figure 8. Subscriber Terminal D128 10
Figure 9. Subscriber Terminal ST-I1 11
Figure 10. Frequency Plans. 12
Figure 11. Three Cell Repeat Pattern. 13
Figure 12. CAS to POTS using LS120. 16
GSI 002
Figure 13. Main Elements of the AS4000 System 1
Figure 14. The AS4000 Omni-Directional Antenna System (typical) 4
Figure 15. Directional Antenna 5
Figure 16. AS4000 CT Equipment Rack 6
Figure 17. Modem Shelf with front cover removed 8
Figure 18. RF Combiner Shelf 9
GSI 003
Figure 19. The AS4000 Subscriber Terminal 1
Figure 20. AS4000 ST-V2 Connection 3
GSI 004
Figure 21. AS8100 Sitespan Network Management 2
Figure 22. Connection Configuration for a Remote AS8300 Element Manager. 3
Figure 23. AS8300 EM Physical Connections 4

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Related Documentation
605-0000-431 System Operations and Maintenance Manual
605-0000-432 Central Terminal - Installation & Commissioning
605-0000-433 Central Terminal – Antenna Feeder Installation & Commissioning
605-0000-436 Subscriber Terminal - Installation & Commissioning
605-0000-437 D128 Terminal Converter
605-0000-435 Material Return and Repair
605-0000-427 AS8100 Sitespan
605-0000-428 Level Control Unit

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Glossary
Abbreviations
AC Alternating Current
AGC Automatic Gain Control
AIS Alarm Indication Signal
BER Bit Error Rate
BRA Basic Rate Access
CAS Channel Associated Signalling
CCS Common Channel Signalling
CDMACode Division Multiple Access
CRU Customer Radio Unit
DASS2 Digital Access Switching System No 2
EM AS8300 Element Manager
FDMA Frequency Division Multiple Access
FRU Field Replaceable Unit
GUI Graphical User Interface
GSM Global System for Mobile Communications
HCI Human Computer Interface
ISDN Integrated Services Digital Network
ISO International Standards Organisation
LE Local Exchange (of the host PSTN)
LNA Low Noise Amplifier
MCI Malicious Call Indication
MF Multi-frequency
N/A Not Applicable
NTE Network Terminating Equipment (ISDN).
NTU Network Termination Unit
O & M Operations and Maintenance
PA Power Amplifier
PAD Packet Assembler Disassembler
PCB Printed Circuit Board
PCM Pulse Code Modulation
PN Pseudo-random Noise
POTS Plain Old Telephony Service (analogue)
PPS Pulses Per Second (LD dialling)
PSDN Packet Switched Data Network
PSTN Public Switched Telephone Network

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PSU Power Supply Unit
RF Radio Frequency
REN Ringer Equivalence Number
Rx Receive
SC Shelf Controller
SPM Subscriber Pulse Metering
SS Spread Spectrum
SVC Switched Virtual Circuit
TE1/2 Terminating Equipment (ISDN)
TU Tributary Unit
Tx Transmit
VF Voice Frequency
Terms
AS4000 Trade name for ACC Wireless Fixed Access System.
Assembly A conglomeration of sub-assemblies.
A Subscriber The customer who initiates the telephone call.
Board An electronic module based on a PCB.
B Subscriber The customer who receives the telephone call.
Card An electronic module that fits in a shelf.
dBm Decibels relative to 1 milli-watt.
dBr Decibels relative to the network PCM level.
Downlink The communication channel from the Central Terminal (CT) to the
Subscriber Terminal (ST).
kPa Kilo Pascals.
Local Loop The local loop is the connection between the subscriber CPE equipment
and the network. It is termed “local loop” because wired POT services
are provided when the CPE equipment “loops”, ie connects, the 2 wires
of the copper pair from the network together.
Line Generator The circuitry that drives the VF line for use by the CPE.
Module A hardware or software building block of a system or sub-system.
Normal Line Feed This is a state in which the VF line generator circuitry provides the
"normal" operational power feed to the line, as appropriate for CPE in
"Off-hook" or "On-hook" states.
Off-hook The VF line is looped by the CPE (call).
Operational Life The period over which the system is designed to remain operational
under normal operating conditions.
On-hook The VF line is open circuit at CPE (no call).
Rack Frame for holding multiple electronic shelves, stacked vertically.
Shelf Frame for holding multiple electronic cards, stacked horizontally.

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Sitespan AS8100 Network management system for a range of ACC products.
System A conglomeration of sub-systems that together provide a service.
Subscriber Customer
Sub-assembly An electronic board or card that requires assembly to manufacture.
Sub-system A conglomeration of modules that together form a major functional
block of a system.
Uplink The communications channel from the ST to the Central Terminal (CT).
Unit A uniquely identifiable physical module.
2 MBit/s 2.048 Million bits per second network interface. 1 per ITU-T
G703/G704.

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INTRODUCTION
1Purpose 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.
2Scope of Document
The System Overview document provides an introduction to the product followed by a
description of its features and its design.
3AS4000 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:

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•Plain Old Telephone System (POTS). equivalent service
•Fixed line 2x 64 kbit/s data services
•Fixed Line ISDN basic rate access 144kbit/s
•The AS4000 System consists of 3 major physical blocks (See Figure 1): Subscriber
Terminals (ST)., which are located at the customer’s premises up to 60 STs per system;
the Central Terminal (CT); and AS8100 Sitespan or the AS8300 Element manager
Central Terminal (CT)
Omni-
Antenna
#1
#60
Air-Interface
Up to 60 ST
Installations
SiteSpan /
Site Controller
Circuits from
ST-D128 to Data
Equipment
Circuits from
ST-V2 to
Exchange
Equipment
Subscriber
Terminal
(ST-V2)
-+-+
CRU
Subscriber
Terminal
(ST-I1)
CRU
Subscriber
Terminal
(ST-D128)
CRU
Circuits from
ST-I1to ISDN
Switch
ACC
AS4000
Figure 1. AS4000 System
The CT and ST terminate each end of the radio link and convert them to the appropriate
communication interface. In the case of the CT, this is the interface to the network
operators equipment. In the case of the ST, this is the service interface to the Customer
Premises Equipment (CPE). The AS8100 Sitespan provides an interface for the network
operator to control and manage the system’s operation and configuration.
4VF system
The ST-V2 (Figure 2) can be used for: