Remerciez-le!

Remerciez @Admin pour avoir partagé cet document gratuitement, de la manière la plus simple, en partageant sur les réseaux sociaux.

P25 Radio Systems www.danelec.com Training Guide TG-001 P25 Radio Systems www.d

P25 Radio Systems www.danelec.com Training Guide TG-001 P25 Radio Systems www.danelec.com i Training Guide P25 Radio Systems Training Guide TG-001 P25 Radio Systems www.danelec.com ii Training Guide Copyright © 2004 Daniels Electronics Ltd. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted in any form or by any means, electronic, mechanical, photocopying, recording or otherwise, without the prior written consent of Daniels Electronics Ltd. DE™ is a registered trademark of Daniels Electronic Ltd. registered in the U.S. Patent and Trademark Ofﬁ ce. IMBE™ and AMBE+2™ are trademarks of Digital Voice Systems, Inc. EDACS® is a registered trademark of M/A-COM, Inc. Aegis™ is a trademark of M/A-COM, Inc. iDEN™ is a trademark of Motorola, Inc. GSM™ is a trademark of GSM Association. ANSI® is a registered trademark of the American National Standards Institute NOTE Daniels Electonics Ltd. utilizes a three-level revision system. This system enables Daniels to identify the signiﬁ cance of a revision. Each element of the revision number signiﬁ es the scope of change as described in the diagram below. DOCUMENT REVISION DEFINITION Major Revisions: The result of a major change to product function, process or requirements. Minor Revisions: The result of a minor change to product, process or requirements. Editorial Revisions: The result of typing corrections or changes in formatting, grammar or wording. 1-0-0 Three-level revision numbers start at 1-0-0 for the ﬁ rst release. The appropriate element of the revision number is incremented by 1 for each subsequent revision, causing any digits to the right to be reset to 0. For example: If the current revision = 2-1-1 Then the next major revision = 3-0-0 If the current revision = 4-3-1 Then the next minor revision = 4-4-0 If the current revision = 3-2-2 Then the next editorial revision = 3-2-3 Daniels Electronics Ltd. 43 Erie Street, Victoria, BC Canada V8V 1P8 www.danelec.com sales@danelec.com Toll Free Canada and USA: phone: 1-800-664-4066 fax: 1-877-750-0004 International: phone: 250-382-8268 fax: 250-382-6139 PRINTED IN CANADA Document Number: Revision: Revision Date: TG-001 1-0-0 Sept 2004 TG-001 P25 Radio Systems www.danelec.com iii Training Guide For the past 50 years Daniels has provided customers in North America and internationally with highly reliable Base Stations and Repeaters that are environmentally robust to operate in rugged and extreme temperature conditions where low current consumption (solar powered) is a key requirement. Daniels has been a pioneering member of the P25 Digital standard, for radio system interoperability between emergency response governmental organizations, providing enhanced functionality and encryption. Our products operate between 29 - 960 MHz and are available in a variety of Base Station and Repeater conﬁ gurations for two way voice and mobile data applications. Our self-servicing customers range from Forestry and National Park services through Police and Fire departments and on to Utility and Transportation groups. Our products have been deployed in every imaginable situation from the Antarctic to Hawaiian mountaintops to Alaska, enabling respondents to Forest Fires, Ground Zero rescue and routine patrols. Daniels is an industry leader in Analog and P25 radio systems design. We offer modular rack mounted Base Stations and Repeaters capable of operating in the following bands: Low Band VHF VHF AM VHF FM UHF 800 MHz 900 MHz ABOUT DANIELS ELECTRONICS LTD. Pete Lunness is a member of the Applied Science Technologists & Technicians of British Columbia and has a Diploma in Electronics Engineering Technology from Camosun College in Victoria, B.C. Pete has worked as a radio technician for the B.C. Ministry of Forests, helping to tune, maintain and install some of the more than 350 Daniels Electronics repeater systems owned by the Forest Service throughout British Columbia. He has been at Daniels for eight years, working in the Engineering (Design and Development) department, the Sales department and most recently in the Technical Services department. For the past ﬁ ve years, Pete has been the instructor for Daniels technical training courses on the MT-3 analog and MT-4 P25 digital radio systems. Many employees throughout Daniels Electronics helped write, compile, research and check the information contained in this document including Ali Mehrpouyan, Steve Burfoot, Ron Backlund, Sean Bourquin, Pawan Premi, Peter Chan and Dale Reitsma. ABOUT THE AUTHOR TG-001 P25 Radio Systems www.danelec.com iv Training Guide Many references were used in the creation of this document. Following is a list of references for P25 information: Aeroﬂ ex, Inc. Aeroﬂ ex Incorporated is a multi-faceted high-technology company that designs, develops, manufactures and markets a diverse range of microelectronic and test and measurement products. Aeroﬂ ex is the manufacturer of the IFR 2975 P25 Radio Test Set. www.P25.com www.ifrsys.com APCO International The Association of Public-Safety Communications Ofﬁ cials - International, Inc. is the world’s oldest and largest not-for-proﬁ t professional organization dedicated to the enhancement of public safety communications www.apcointl.org DVSI Digital Voice Systems, Inc., using its proprietary voice compression technology, specializes in low-data-rate, high-quality speech compression products for wireless communications, digital storage, and other applications. DVSI is the manufacturer of the IMBE and AMBE+2 vocoders. www.dvsinc.com PTIG The Project 25 Technology Interest Group (PTIG) is a group composed of public safety professionals and equipment manufacturers with a direct stake in the further development of, and education on, the P25 standards. PTIG’s purpose is to further the design, manufacture, evolution, and effective use of technologies stemming from the P25 standardization process. www.project25.org TIA The Telecommunications Industry Association is the leading U.S. non-proﬁ t trade association serving the communications and information technology industry, with proven strengths in market development, trade shows, domestic and international advocacy, standards development and enabling e-business. www.tiaonline.org REFERENCES TG-001 P25 Radio Systems www.danelec.com v Training Guide Contents Chapter 1: Introduction To P25 ..............................................1 What is Project 25? ....................................................................................1 P25 Phases ................................................................................................2 Conventional vs. Trunked ..........................................................................3 How does P25 work? .................................................................................4 P25 Radio System Architecture .................................................................5 Beneﬁ ts of P25 ...........................................................................................8 Other Digital Standards ............................................................................ 12 P25 Participants ....................................................................................... 14 Chapter 2: P25 Interface Standards .................................... 17 P25 Standards – General System Model ................................................. 17 RF Sub-System ........................................................................................ 19 Common Air Interface .............................................................................. 19 Inter-System Interface .............................................................................. 20 Telephone Interconnect Interface ............................................................. 21 Network Management Interface ............................................................... 21 Data Host or Network Interface ................................................................ 21 Data Peripheral Interface ......................................................................... 22 Fixed Station Interface ............................................................................. 22 Console Sub-System Interface ................................................................ 23 Chapter 3: P25 Practical Applications .................................. 25 Analog to P25 Transition .......................................................................... 25 P25 Frequency Bands ............................................................................. 25 P25 Digital Code Deﬁ nitions .................................................................... 26 P25 Voice Message Options .................................................................... 34 P25 Encryption ......................................................................................... 37 Analog vs. P25 Digital Coverage ............................................................. 38 P25 Radio System Testing ....................................................................... 41 P25 vs. Analog Delay Times .................................................................... 43 Chapter 4: Anatomy of the Common Air Interface ............... 47 Voice ........................................................................................................ 47 Data ......................................................................................................... 48 Frame Synchronization and Network Identiﬁ er ........................................ 48 Status Symbols ........................................................................................ 49 Header Data Unit ..................................................................................... 49 Voice Code Words ................................................................................... 50 Logical LINK Data Unit 1 .......................................................................... 51 Logical LINK Data Unit 2 .......................................................................... 52 Low Speed Data ...................................................................................... 53 Terminator Data Unit ................................................................................ 53 Packet Data Unit ...................................................................................... 55 Chapter 5: IMBE™ And AMBE+2™ Vocoders ..................... 57 Chapter 6: P25 Glossary of Terms ....................................... 59 TG-001 P25 Radio Systems www.danelec.com vi Training Guide This Page Intentionally Left Blank TG-001 P25 Radio Systems www.danelec.com Chapter 1: Introduction To P25 1 Training Guide This document is written with the intention of supplying the reader with a simple, concise and informative description of Project 25. The document assumes the reader is familiar with conventional Two-Way Radio Communications systems. Project 25 is a standards initiative, to be amended, revised, and added to as the users identify issues, and as experience is gained. WHAT IS PROJECT 25? Project 25 (P25) is a set of standards produced through the joint efforts of the Association of Public Safety Communications Ofﬁ cials International (APCO), the National Association of State Telecommunications Directors (NASTD), selected Federal Agencies and the National Communications System (NCS), and standardized under the Telecommunications Industry Association (TIA). P25 is an open architecture, user driven suite of system standards that deﬁ ne digital radio communications system architectures capable of serving the needs of Public Safety and Government organizations. The P25 suite of standards involves digital Land Mobile Radio (LMR) services for local, state/provincial and national (federal) public safety organizations and agencies. P25 open system standards deﬁ ne the interfaces, operation and capabilities of any P25 compliant radio system. In other words, a P25 radio is any radio that conforms to the P25 standard in the way it functions or operates. P25 compliant radios can communicate in analog mode with legacy radios and in either digital or analog mode with other P25 radios. The P25 standard exists in the public domain, allowing any manufacturer to produce a P25 compatible radio product. P25 is applicable to LMR equipment authorized or licensed in the U.S. under the National Telecommunications and Information Administration (NTIA) or Federal Communications Commission (FCC) rules and regulations. CHAPTER 1: INTRODUCTION TO P25 TG-001 P25 Radio Systems www.danelec.com Chapter 1: Introduction To P25 2 Training Guide Although developed primarily for North American public safety services, P25 uploads/Management/ p25-radio-systems-training-guide.pdf