AS4000 Wireless Local Loop System System Overview 605-0000-430 Issue 1.
AS4000 Wireless Local Loop System Overview 605-0000-430 Issue 1.
AS4000 Wireless Local Loop System Overview Preface 605-0000-430 Issue 1.2 Date 7/4/99 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.
AS4000 Wireless Local Loop System Overview 605-0000-430 Issue 1.
AS4000 Wireless Local Loop System Overview Preface 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. 3.
AS4000 Wireless Local Loop System Overview Preface 605-0000-430 Issue 1.2 Date 7/4/99 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’).
AS4000 Wireless Local Loop System Overview Preface 605-0000-430 Issue 1.
AS4000 Wireless Local Loop System Overview 605-0000-430 Issue 1.
AS4000 Wireless Local Loop System Overview ICL 001 605-0000-430 Issue 1.2 Date 7/4/99 ISSUE CONTROL LIST Title Issue Date Title Page 1.2 April 1999 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.
AS4000 Wireless Local Loop System Overview 605-0000-430 Issue 1.2 Date 7/4/99 CHANGE TYPE/DATE PURPOSE PAGES AFFECTED Issue #, Month Year 1.0 1-7-98 Derived from 152-031- All 100 for AS4000 product 1.1 2/9/98 1.
AS4000 Wireless Local Loop System Overview IXL 001 605-0000-430 Issue 1.2 Date 7/4/99 INDEX TASK LIST Preface: Safety Instructions Warnings and Cautions User Response Form ACCESS: ICL, IXL Issue Control List .................................................................................................. ICL-001 Index Task List ....................................................................................................
AS4000 Wireless Local Loop System Overview IXL 001 605-0000-430 Issue 1.2 Date 7/4/99 8.3.1 The Subscriber Interface................................................................................ 11 8.4 Frequency Planning............................................................................................... 11 9 Code Division Multiple Access (CDMA) Overview .................................................. 12 9.1 Spread Spectrum ..................................................................
AS4000 Wireless Local Loop System Overview IXL 001 605-0000-430 Issue 1.2 Date 7/4/99 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.
AS4000 Wireless Local Loop System Overview IXL 001 605-0000-430 Issue 1.
AS4000 Wireless Local Loop System Overview 605-0000-430 Issue 1.
AS4000 Wireless Local Loop System Overview IXL 001 605-0000-430 Issue 1.2 Date 7/4/99 PSU RF REN Rx SC SPM SS SVC TE1/2 TU Tx VF Terms AS4000 Assembly A Subscriber Board B Subscriber Card dBm dBr Downlink Power Supply Unit Radio Frequency Ringer Equivalence Number Receive Shelf Controller Subscriber Pulse Metering Spread Spectrum Switched Virtual Circuit Terminating Equipment (ISDN) Tributary Unit Transmit Voice Frequency Trade name for ACC Wireless Fixed Access System.
AS4000 Wireless Local Loop System Overview IXL 001 605-0000-430 Issue 1.2 Date 7/4/99 Sitespan System Subscriber Sub-assembly Sub-system Uplink Unit 2 MBit/s Page 7 of 8 AS8100 Network management system for a range of ACC products. A conglomeration of sub-systems that together provide a service. Customer An electronic board or card that requires assembly to manufacture. A conglomeration of modules that together form a major functional block of a system.
AS4000 Wireless Local Loop System Overview 605-0000-430 Issue 1.
AS4000 Wireless Local Loop System Overview GSI 001 605-0000-430 Issue 1.2 Date 7/4/99 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.
AS4000 Wireless Local Loop System Overview GSI 001 605-0000-430 Issue 1.2 Date 7/4/99 • 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).
AS4000 Wireless Local Loop System Overview GSI 001 605-0000-430 Issue 1.2 Date 7/4/99 • Plain Old Telephone System (POTS). Each CRU provides two VF lines that can be used as a direct replacement for those in a copper loop. All the facilities afforded to telephony over copper lines can be offered over AS4000. These include features such Malicious Call Indication (MCI) and Calling Line Identification (CLI). Answering Machines and other devices can be attached up to Ringing Equivalent Number 4 (REN 4).
AS4000 Wireless Local Loop System Overview GSI 001 605-0000-430 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=1x10-7 or better). 5.
AS4000 Wireless Local Loop System Overview GSI 001 605-0000-430 Issue 1.2 Date 7/4/99 5.5 Local Area Networks The D128 can be used to connect bridges and routers together in a LAN (Figure 3). 2 x 64kbit/s 2 x 64kbit/s Remote LAN Remote LAN Key: Data Subscriber Terminal 2 x 64kbit/s 4 x 2 Mbit/s G.703 Airspan Central Terminal Remote LAN Packet Switch Lan Bridge Local LAN Local LAN Figure 3. AS4000 using ST-D128 for remote LAN Bridging 5.
AS4000 Wireless Local Loop System Overview GSI 001 605-0000-430 Issue 1.2 Date 7/4/99 6 ST-I1 ISDN ISDN provides digital links into telephone network so that voice, data, text, graphics, music, video, and other source material can be provided to end users from a single end-user terminal. ISDN applications include high-speed image applications (such as Group IV facsimile), additional telephone lines in homes to serve the telecommuting industry, high-speed file transfer, and video conferencing and voice.
AS4000 Wireless Local Loop System Overview GSI 001 605-0000-430 Issue 1.2 Date 7/4/99 The Subscriber Terminal acts as an NT1 network termination to connect the terminal equipment into the ISDN Network. Reference points define logical interfaces between functional groupings such as TAs and NT1s. The S (the reference point is between user terminals and the AS4000 Subscriber Terminal), and V (the reference point between the AS4000 CT and the line-termination equipment in the carrier network).
AS4000 Wireless Local Loop System Overview GSI 001 605-0000-430 Issue 1.2 Date 7/4/99 Antenna AS4000 Central Terminal Rack ACC AS4000 To Host Network Network Interface (2Mbit/s) Antenna Feeder Figure 6. Central Terminal The antenna and feeder sub-system consists of a two stacked dipole -high gain omnidirectional antenna assembly mounted on a pole or mast and low-loss coaxial feeder cables which connect the antennas to the CT equipment rack. The AS4000 Central Terminal Rack is a 2.
AS4000 Wireless Local Loop System Overview GSI 001 605-0000-430 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. • Type 4 contains provision for a battery backup supply if the main AC supply fails and the capability of providing status information to Sitespan.
AS4000 Wireless Local Loop System Overview GSI 001 605-0000-430 Issue 1.2 Date 7/4/99 8.2 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 support. TS16 signalling support is not required.
AS4000 Wireless Local Loop System Overview GSI 001 605-0000-430 Issue 1.2 Date 7/4/99 8.3 Subscriber Terminal ISDN (ST- I1) 8.3.1 The Subscriber Interface The Subscriber interface is an “S” Basic Rate Interface (2B+D) at the customer premises, i.e. NT1 functionality. This interface is according to ITU-T (CCITT) I.420/421 {ETS 300 012, 300 125 and 300 102-1}, and provides a short passive bus connection at the Subscriber Terminal.
AS4000 Wireless Local Loop System Overview GSI 001 605-0000-430 Issue 1.2 Date 7/4/99 C 2.0 Frequency Ranges TX An Airspan Channel Plan 1 S 2.3 2.5 3.4 X 3.6 Ghz RX 12 1 12 – C Band 2.0 - 2.3 GHz Channel Spacing 3.5 Mhz Duplex Spacing 175Mhz C1 2028Mhz to 2245Mhz C2 2045.5Mhz to 2262.5Mhz C3 2066.5Mhz to 2283.5Mhz – S Band 2.3 - 2.5 GHz Channel Spacing 4.0 Mhz Duplex Spacing 94Mhz S1 2306 Mhz to 2448 Mhz S3 2338 Mhz to 2480 Mhz –X Band 3.4 - 3.6 GHz Channel Spacing 3.
AS4000 Wireless Local Loop System Overview GSI 001 605-0000-430 Issue 1.2 Date 7/4/99 using a code whose bit rate is much higher than the bit rate of the message (typically in the order of 16 times). The individual bits of the code are referred to as chips. The incoming signal at the receiver consists of the modulated message plus the channel noise. By multiplying the same code by the incoming signal, ‘despreading’is achieved.
AS4000 Wireless Local Loop System Overview GSI 001 605-0000-430 Issue 1.2 Date 7/4/99 In each of the 3 cells a group of frequencies is allocated as follows: Group 1 F1, F4, F7, F10 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.
AS4000 Wireless Local Loop System Overview GSI 001 605-0000-430 Issue 1.
AS4000 Wireless Local Loop System Overview GSI 001 605-0000-430 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 NETWORK Channel INTERFACE Bank 2 Wire VF 4 X 2Mbit/s G.703 Air Interface SUBSCRIBER INTERFACES Figure 12. CAS to POTS using LS120.
AS4000 Wireless Local Loop System Overview GSI 002 605-0000-430 Issue 1.2 Date 7/4/99 AS4000 CENTRAL TERMINAL HARDWARE OVERVIEW.
AS4000 Wireless Local Loop System Overview GSI 002 605-0000-430 Issue 1.2 Date 7/4/99 The standard management interface at the CT equipment is 1 to 4, V.24 (RS232) terminations which is connected to serial ports on a PC (1 port for each Modem Shelf). 1 The Network Interfaces V2 and D128 Systems The standard traffic interface at the CT equipment is 1-4, 2 Mbit/s, 30 Channel Pulse Code Modulation (PCM), conforming to ITU Recommendation G703.
AS4000 Wireless Local Loop System Overview GSI 002 605-0000-430 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°. This mechanical assembly is shown in Figure 15. 2.2 Interface Connections The coax antenna feeder cables connect via N-Type connectors to the Branching Unit (BU) located in the top left section of the RF Combiner Shelf.
AS4000 Wireless Local Loop System Overview 605-0000-430 Issue 1.2 Date 7/4/99 NOTE: An installation will Consist of two antennae, two feeders and associated kit. Antenna Beam U-Clamps Mounting Pole Earth Point Cold Shrink Feeder Tail Mounting Plate Cold Shrink Feeder Earth 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.
AS4000 Wireless Local Loop System Overview 605-0000-430 Issue 1.2 Date 7/4/99 Adjustable Bracket Antenna Fixed Bracket N-type Feeder Connections Figure 15.
AS4000 Wireless Local Loop System Overview GSI 002 605-0000-430 Issue 1.2 Date 7/4/99 3 3.1 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). (see Figure 16). ACC RF Combiner Shelf AS4000 Modem Shelf 1 2.
AS4000 Wireless Local Loop System Overview GSI 002 605-0000-430 Issue 1.2 Date 7/4/99 3.2 Power Requirements Each Rack requires two DC power supplies. The supply can range from -22 Volt to -60 Volt DC. The input current for a fully loaded rack is 28 Amps at 22 Volt reducing to 8.5 Amps at 60 Volt. 3.3 CT Equipment Rack Shelves: Modem Shelves Each Modem Shelf terminates one RF Channel, supporting up to 15 radio links, provides a CAS or DASS2 network interface with the Local Exchange and a V.
AS4000 Wireless Local Loop System Overview GSI 002 605-0000-430 Issue 1.2 Date 7/4/99 AIR RAMP Modems 1 to15 + Spare (2 Per Card) SC TU AU Cards FRONT COVER Shelf Interface Connectors Alarm Panel Figure 17. Modem Shelf with front cover removed RF Combiner Shelf The RF Combiner Shelf forms the interface between the Antenna/Feeder Sub-system and individual Modem Shelves. The RF Combiner Shelf performs the functions necessary to connect up to four RF signals to the Antenna/Feeder Sub-system.
AS4000 Wireless Local Loop System Overview GSI 002 605-0000-430 Issue 1.2 Date 7/4/99 • a Low Noise Amplifier (LNA) module, which amplifies the low-level receive signal, after filtering but before splitting. • a Shelf Monitor Card, which collects information from the PAs, LNA and PSUs, and passes it to the Shelf Controller Cards.
AS4000 Wireless Local Loop System Overview GSI 002 605-0000-430 Issue 1.2 Date 7/4/99 • 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).
AS4000 Wireless Local Loop System Overview GSI 003 605-0000-430 Issue 1.2 Date 7/4/99 SUBSCRIBER TERMINAL HARDWARE OVERVIEW 1 General Description Located at the customer’s premises, the ST equipment terminates the radio link and provides the interface to the customer premises equipment (CPE) e.g., telephone, facsimile machine, personal computer, modem etc.
AS4000 Wireless Local Loop System Overview GSI 003 605-0000-430 Issue 1.2 Date 7/4/99 1.1 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. They contain most of the electronics circuitry necessary to fulfil the function of terminating the RF communications link to the CT equipment.
AS4000 Wireless Local Loop System Overview GSI 003 605-0000-430 Issue 1.2 Date 7/4/99 CRU Drop Cable NTU PSU NTU ~ Mains Plug Figure 20. AS4000 ST-V2 Connection The maximum length of this Drop Cable is 25m. with a 40mm maximum bend radius. 1.4 Network Termination Unit (NTU) when using ST-V2 The two 2-wire VF line feeds connect to the CPE with the one or two NTUs located within the customers premises into which a range of devices can be plugged.
AS4000 Wireless Local Loop System Overview GSI 003 605-0000-430 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. 1.5 Network Termination Unit when using ST-D128 The Single Network Termination Unit can be cabled either from the junction box or cabled direct from the CRU. The 2 Mbit/s Tx and Rx pairs are cabled using twisted pairs.
AS4000 Wireless Local Loop System Overview GSI 003 605-0000-430 Issue 1.2 Date 7/4/99 1.9 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. In addition, the AC PSU contains an internal 24 V lead-acid battery which is trickle-charged and which provides a back-up supply for approximately three hours. The battery has an operational life of five years.
AS4000 Wireless Local Loop System Overview 605-0000-430 Issue 1.
AS4000 Wireless Local Loop System Overview GSI 004 605-0000-430 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 1 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.
AS4000 Wireless Local Loop System Overview GSI 004 605-0000-430 Issue 1.2 Date 7/4/99 X25 Packet Switched Network DSC RF Combiner Airspan Shelf Modem Shelf 1 or Modem Shelf 2 Modem Shelf 3 Dialup Modem Link Modem Shelf 4 or Airspan SiteSpan Equipment View PC Fixed Link SiteSpan Server PC Equipment View Optional Figure 21.
AS4000 Wireless Local Loop System Overview GSI 004 605-0000-430 Issue 1.2 Date 7/4/99 2 AS8300 Element Manger The AS8300 Element Manager (EM) is an Operations and Management System, a computer based network management system for the AS4000 System that does not use a GUI based screen presentation. The Element manager can control a number of systems (including the remotely located STs).
AS4000 Wireless Local Loop System Overview GSI 004 605-0000-430 Issue 1.2 Date 7/4/99 Airspan Central Terminal Racks Network Management Layer Shelf Controllers System Management Terminal PADs ISO 8820-3 Ethernet CMIP X25 Airspan EM V24 T-Switch Virtual Console System ISO 8820-3 Ethernet - Telnet HCI Terminals Figure 23. AS8300 EM Physical Connections Physical Connections At: the Network Administration and Control Centre.
AS4000 Wireless Local Loop System Overview GSI 004 605-0000-430 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. System Managers Terminal (SMT) and Virtual Console System (VCS).
AS4000 Wireless Local Loop System Overview 605-0000-430 Issue 1.
