1. Manuals
  2. Brands
  3. Airspan Manuals
  4. Wireless Access Point
  5. AS4000
  6. System overview

Airspan AS4000 System Overview

Wireless local loop system
Hide thumbs Also See for AS4000:
Table of Contents

Advertisement

Quick Links

See also: Operator's Manual
AS4000
Wireless Local Loop System
System Overview
605-0000-430
© Copyright Airspan Communications Corporation 1999
Issue 1.2 7/4/99

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the AS4000 and is the answer not in the manual?

Questions and answers

Related Manuals for Airspan AS4000

Summary of Contents for Airspan AS4000

  • Page 1 AS4000 Wireless Local Loop System System Overview 605-0000-430 © Copyright Airspan Communications Corporation 1999 Issue 1.2 7/4/99...
  • Page 2 AS4000 Wireless Local Loop Preface System Overview 605-0000-430 Issue 1.2 Date 7/4/99 This Page Intentionally Blank Page 2 of 8...
  • Page 3 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.
  • Page 4 AS4000 Wireless Local Loop Preface System Overview 605-0000-430 Issue 1.2 Date 7/4/99 This Page Intentionally Blank Page 4 of 8...
  • Page 5 AS4000 Wireless Local Loop Preface System Overview 605-0000-430 Issue 1.2 Date 7/4/99 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.
  • Page 6 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 Symbol on an Airspan product signifies that it has been certified according to the EMC directive 89/336/EEC.
  • Page 7 AS4000 Wireless Local Loop Preface System Overview 605-0000-430 Issue 1.2 Date 7/4/99 User Response Form Mail: Airspan Communications Limited Fax: (44) 895 4677182 Cambridge House Oxford Road Uxbridge Middlesex UB8 1UN Document Rating Excellent Good Average Below Average Poor Accuracy / Completeness...
  • Page 8 AS4000 Wireless Local Loop Preface System Overview 605-0000-430 Issue 1.2 Date 7/4/99 This Page Intentionally Blank Page 8 of 8...
  • Page 9 Title Issue Date Issue Details Title Page April 1999 Band name changes ICL-001 April 1999 IXL-001 April 1999 GSI-001 April 1999 GSI-002 April 1999 GSI-003 April 1999 GSI-004 April 1999 Page 1 of 2 © Copyright Airspan Communications Corporation 1999...
  • Page 10 AS4000 Wireless Local Loop ICL 001 System Overview 605-0000-430 Issue 1.2 Date 7/4/99 CHANGE TYPE/DATE PURPOSE PAGES AFFECTED Issue #, Month Year Derived from 152-031- 100 for AS4000 1-7-98 product 2/9/98 Changes to Band Various Descriptions 7/4/99 Page 2 of 2...

  • Page 11: Table Of Contents

    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 Page 1 of 8 © Copyright Airspan Communications Corporation 1999...
  • Page 12 AS4000 Wireless Local Loop IXL 001 System Overview 605-0000-430 Issue 1.2 Date 7/4/99 8.3.1 The Subscriber Interface................11 8.4 Frequency Planning....................11 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 ...............
  • Page 13 Figures Page GSI 001 Figure 1. AS4000 System Figure 2. ST-V2 Applications Figure 3. AS4000 using ST-D128 for remote LAN Bridging Figure 4. AS4000 ISDN Figure 5. ISDN Reference Points Figure 6. Central Terminal Figure 7. Subscriber Terminal V2 Figure 8. Subscriber Terminal D128 Figure 9.
  • Page 14 AS4000 Wireless Local Loop IXL 001 System Overview 605-0000-430 Issue 1.2 Date 7/4/99 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...
  • Page 15 AS4000 Wireless Local Loop IXL 001 System Overview 605-0000-430 Issue 1.2 Date 7/4/99 Glossary Abbreviations Alternating Current Automatic Gain Control Alarm Indication Signal Bit Error Rate Basic Rate Access Channel Associated Signalling Common Channel Signalling CDMACode Division Multiple Access Customer Radio Unit...
  • Page 16 AS4000 Wireless Local Loop IXL 001 System Overview 605-0000-430 Issue 1.2 Date 7/4/99 Power Supply Unit Radio Frequency Ringer Equivalence Number Receive Shelf Controller Subscriber Pulse Metering Spread Spectrum Switched Virtual Circuit TE1/2 Terminating Equipment (ISDN) Tributary Unit Transmit Voice Frequency...
  • Page 17 AS4000 Wireless Local Loop IXL 001 System Overview 605-0000-430 Issue 1.2 Date 7/4/99 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.
  • Page 18 AS4000 Wireless Local Loop IXL 001 System Overview 605-0000-430 Issue 1.2 Date 7/4/99 This Page Intentionally Blank Page 8 of 8...

  • Page 19: Purpose Of Document

    INTRODUCTION 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.

  • Page 20: Vf System

    • 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;...

  • Page 21: Data

    Call Indication (MCI) and Calling Line Identification (CLI). Answering Machines and other devices can be attached up to Ringing Equivalent Number 4 (REN 4). • Payphones. The AS4000 ST-V2 may be used for payphones and supports the use of 12 &16 kHz tones for operation of the mechanism.

  • Page 22: Applications Of The St-D128

    AS4000 Wireless Local Loop GSI 001 System Overview 605-0000-430 Issue 1.2 Date 7/4/99 • Mixed rate voice (compressed), data and video equipment • Global System for Mobile Communications (GSM) base stations in microcells These applications require the use of dedicated fixed links, with 64 kbit/s data rates, and bit error rates (RBER=1x10 or better).

  • Page 23: Local Area Networks

    Lan Bridge Local LAN Local LAN Figure 3. AS4000 using ST-D128 for remote LAN Bridging The Micro-Cellular Application Most “Microcellular” applications (GSM 900 and DSC 1800, and PCS 1900) require one or two GSM transceivers for efficient use of the cellular spectrum. This means that the requirement is for 2-6 x 64 kbit/s.

  • Page 24: St-I1 Isdn

    The AS4000 ST-I1 ISDN system provides ISDN's Basic Rate Access (BRA) service offers two B channels and one D channel ( 2B+D). BRA B-channel service operates at 64 kbit/s and is meant to carry user data;...

  • Page 25: Central Terminal (Ct)

    Figure 5. ISDN Reference Points Central Terminal (CT) The AS4000 CT consists of both an equipment rack and an antenna and feeder system. This equipment is normally located at the Radio Site with transmission backhaul to the Central Office premises. (see Figure 6).

  • Page 26: Subscriber Terminals (St)

    CT equipment rack. The AS4000 Central Terminal Rack is a 2.2m high ETSI practice equipment rack which contains multiple shelf assemblies. These house the equipment necessary to support up to 60 customer radio links and from one to four 2 Mbit/s links to the Local Exchange (LE).

  • Page 27: Issue 1.2 Date 7/4/99

    AS4000 Wireless Local Loop GSI 001 System Overview 605-0000-430 Issue 1.2 Date 7/4/99 • Type 1 is an AC/DC converter and a Junction Box, • Type 2 contains provision for a battery backup supply if the main AC supply fails and the capability of providing status information to Sitespan.

  • Page 28: Subscriber Terminal D128 (St-D128)

    AS4000 Wireless Local Loop GSI 001 System Overview 605-0000-430 Issue 1.2 Date 7/4/99 Subscriber Terminal D128 (ST-D128) 8.2.1 The Subscriber Interface The ST-D128 (Figure 8) provides fixed link access in support of CPE and special applications that can utilise fractional E1, N x 64 kbit/s services. The ST-D128 supports two 64 kbit/s time-slots on a 2 Mbit/s G.703 interface with TS0 alarm and synchronisation...

  • Page 29: Subscriber Terminal Isdn (St- I1)

    Frequency Planning Figure 10 shows the current AS4000 frequency plans. The deployment of AS4000 will depend upon the requirements for coverage. When deployed over a wide area Central Terminals will be deployed using a reuse pattern of three. This means that all twelve channels required for a wide area deployment as shown in Figure 11 below will be used in three adjacent cells.

  • Page 30: Code Division Multiple Access (Cdma) Overview

    Figure 10. Frequency Plans. Code Division Multiple Access (CDMA) Overview The design of the AS4000 Wireless Fixed Access System (WFAS)equipment incorporates a number of the latest radio transmission techniques, in addition to the use of digital line- transmission and inter-node signalling techniques.

  • Page 31: Code Division Multiple Access

    Code Division Multiple Access In the AS4000 System, one radio channel supports 15 radio links (DS/SS transmissions) which co-exist within the same bandwidth. To achieve this, the technique of CDMA is employed which uses a set of orthogonal (RW) codes to modulate individual channels.
  • Page 32 Group 2 F2, F5, F8, F11 Group 3 F3, F6, F9, F12 The 3 cell reuse factor that is used in CDMA systems such as AS4000 cannot be used for other types of Wireless Access systems using TDMA or FDMA systems.

  • Page 33: 10 Litespan-120 (Ls-120) Channel Bank

    The LS-120 channel bank equipped with basic channel units is used to connect the AS4000 to the Exchange Switch for POTS services. The LS120 is capable of providing terminations for a complete AS4000 system for a total of up to 120 customer terminations.
  • Page 34 AS4000 Wireless Local Loop GSI 001 System Overview 605-0000-430 Issue 1.2 Date 7/4/99 LS120 Interfaces • 75 ohm connection to the AS4000. • VF interface to the Exchange switch. Customer Radio ST-V2 Unit Airspan Central Terminal LS-120 Channel NETWORK Bank...

  • Page 35: Gsi 002

    2.3 GHz to 2.5 GHz range (S1+S3) or the 3.4 to 3.6Ghz range (X1 to X3). Control of the AS4000 System is vested in a control system, Sitespan, which can be co- located with the CT equipment, or remotely located at a Network Administration Centre.

  • Page 36: The Network Interfaces

    CAS multiframe using ABCD bits. DASS2 signalling protocol is also supported 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.

  • Page 37: Interface Connections

    AS4000 Wireless Local Loop GSI 002 System Overview 605-0000-430 Issue 1.2 Date 7/4/99 Directional Antenna System The directional antenna sub-system consists of a flat plat antenna with mounting brackets suitable for mounting on a pole up to 100mm diameter. And a HPBW azimuth of 60/65° .
  • Page 38 Type H Split Bolt Earthing Cable Feeder Hangers Catenary Feeder Feeder Earth Type H Split Bolt Feed-thru with waterproof gland Wood Pole or Mast Feeder Earth Ground Earth Spike Figure 14. The AS4000 Omni-Directional Antenna System (typical) Page 4 of 8...
  • Page 39 AS4000 Wireless Local Loop GSI 002 System Overview 605-0000-430 Issue 1.2 Date 7/4/99 Adjustable Bracket Antenna N-type Feeder Connections Fixed Bracket Figure 15. Directional Antenna Page 5 of 8...

  • Page 40: Central Terminal (Ct)

    Central Terminal (CT) General Description The 2.2m high ETSI style AS4000 CT equipment rack is a rack which contains multiple shelf assemblies. These house the equipment necessary to support from one to 60 customer radio links and from one to four 2 Mbit/s CAS or DASS2 links to the Local Exchange (LE).

  • Page 41: Power Requirements

    (for the RF Card in the RF Combiner Shelf) and supplies the TU Card with the recovered 2 MHz clock signal. • a Shelf Controller Card, which provides the management interface between the AS4000/ Sitespan /EM and its supported Central Terminals. It also holds the configuration details in NVRAM.
  • Page 42 AS4000 Wireless Local Loop GSI 002 System Overview 605-0000-430 Issue 1.2 Date 7/4/99 AIR RAMP Shelf Interface Modems 1 to15 + Spare SC TU AU Connectors (2 Per Card) Cards Alarm FRONT COVER Panel Figure 17. Modem Shelf with front cover removed...
  • Page 43 • Three PSUs to provide the interface between the local DC power source and the equipment of the AS4000 CT Rack. The shelf contains two circuit breakers, to give protection by using two independent DC supplies, and three PSUs which supply a nominal 13.5V DC.
  • Page 44 • The RF Combiner Shelf also contains an alarm extension unit which receives alarm information from the AS4000 equipment, analyses it and then informs the local suite alarm system to which certain alarms are extended. Depending on the severity of the condition, the alarm extension unit recognises either a Prompt alarm (immediate attention required) or a Deferred alarm (action can be delayed).

  • Page 45: Gsi 003

    AC Power Supply Unit (AC PSU) Customer’ s Premises Radio Link Customer Radio Unit Mains Supply AC Power Supply Unit Network Termination Unit Customer Premises Equipment Network Termination Unit Figure 19. The AS4000 Subscriber Terminal Page 1 of 6 © Copyright Airspan Communications Corporation 1999...

  • Page 46: Customer Radio Unit

    AS4000 Wireless Local Loop GSI 003 System Overview 605-0000-430 Issue 1.2 Date 7/4/99 Customer Radio Unit The 2.0 - 2.3GHz Band and 2.3 - 2.5GHz Band CRUs contain two flat-plate integrated antennas and the 2.0 - 2.3GHz Band CRU contains a single flat-plate integrated antenna.

  • Page 47: Network Termination Unit (Ntu) When Using St-V2

    Note. Line reversal is not supported. All tones, tone cadences and announcements which are generated by the Local Exchange are passed transparently over the AS4000 System. Line feed voltage, ringing current and ringing cadence are generated by the ST equipment.

  • Page 48: Network Termination Unit When Using St-D128

    AS4000 Wireless Local Loop GSI 003 System Overview 605-0000-430 Issue 1.2 Date 7/4/99 The specific impedance of the NTU allows tests to be performed by the CRU to ascertain whether the NTU is present on a line and if there is any CPE attached.

  • Page 49: Ac Power Supply Unit (Type 2/4)

    AS4000 Wireless Local Loop GSI 003 System Overview 605-0000-430 Issue 1.2 Date 7/4/99 AC Power Supply Unit (Type 2/4) The Type 2 and Type 4 AC PSUs are available for the ST-V2 The AC PSU 230/110V (1 Amp) AC mains supply mains supply is converted to 24 V DC to power the external CRU.

  • Page 50: Gsi 004

    AS4000 Wireless Local Loop GSI 003 System Overview 605-0000-430 Issue 1.2 Date 7/4/99 This Page Intentionally Blank Page 6 of 6...

  • Page 51: As8100 Sitespan

    System Overview 605-0000-430 Issue 1.2 Date 7/4/99 SYSTEM MANAGEMENT There are two systems available for managing the AS4000 System. AS8100 Sitespan and AS8300 Element Manager AS8100 Sitespan AS8100 Sitespan can manage a range of ACC products (AS4000, Multiline, and Litespan) and is designed to allow the management of these from a central location.
  • Page 52 AS4000 Wireless Local Loop GSI 004 System Overview 605-0000-430 Issue 1.2 Date 7/4/99 X25 Packet Switched Combiner Airspan Shelf Network Modem Shelf 1 Modem Shelf 2 Modem Shelf 3 Dialup Modem Link SiteSpan Modem Shelf 4 Equipment View PC Airspan...

  • Page 53: As8300 Element Manger

    The Element manager can control a number of systems (including the remotely located STs). The AS8300 EM is designed to offer the necessary functionality to manage a large AS4000 sub-network and be located in a central Operations and Maintenance environment away from the rest of the system.
  • Page 54 Physical Connections At: the Network Administration and Control Centre. • AS4000 to HCI - Ethernet (TCP/IP Protocol) • AS8300 EM to SMT - Similar to ITU-T RS232 (Assent 9600 baud) • AS8300 EM to Network Management Layer - Ethernet (OSI/CMIP Protocol) •...

  • Page 55: 2.1.1 Em Interface Specifications

    AS4000 Wireless Local Loop GSI 004 System Overview 605-0000-430 Issue 1.2 Date 7/4/99 2.1.1 EM Interface Specifications The interfaces to AS8300 EM (see Figure 23) are: Human Computer Interface (HCI) Terminals. These are VT220 terminals or emulators, which communicate with the AS8300 EM over an ISO 8802-3 Ethernet, using TCP/IP and Telnet protocols.
  • Page 56 AS4000 Wireless Local Loop GSI 004 System Overview 605-0000-430 Issue 1.2 Date 7/4/99 This Page Intentionally Blank Page 6 of 6...

Table of Contents