Introdução Às Redes De Computadores

Total Page:16

File Type:pdf, Size:1020Kb

Introdução Às Redes De Computadores MÓDULO DE: INTRODUÇÃO ÀS REDES DE COMPUTADORES AUTORIA: Ing. M.Sc./D.Sc. ANIBAL D. A. MIRANDA Copyright © 2008, ESAB – Escola Superior Aberta do Brasil 1 Copyright © 2007, ESAB – Escola Superior Aberta do Brasil Módulo de: INTRODUÇÃO ÀS REDES DE COMPUTADORES Autoria: Ing. M.Sc./D.Sc. Anibal D. A. Miranda Primeira edição: 2008 Todos os direitos desta edição reservados à ESAB – ESCOLA SUPERIOR ABERTA DO BRASIL LTDA http://www.esab.edu.br Av. Santa Leopoldina, nº 840/07 Bairro Itaparica – Vila Velha, ES CEP: 29102-040 Copyright © 2008, ESAB – Escola Superior Aberta do Brasil 2 Copyright © 2007, ESAB – Escola Superior Aberta do Brasil Apresentação Familiarização do aluno com as diversas técnicas de conectividade entre computadores, criando redes de tamanhos diferentes ,assim como, entender a importância dos protocolos de comunicações para um correto funcionamento desses sistemas interligados de redes. Objetivo O histórico, finalidades, formas de transmissão, conceitos básicos de telecomunicações, protocolos, meios de transmissão, topologias, equipamentos, conceitos de segurança em redes, arquitetura de redes e tecnologias de redes. Ementa Conceitos gerais; sistemas operacionais de rede; princípios de telecomunicações; redes de computadores; topologia de redes; cabeamento de rede; padrões meios de redes; modelo TCP/IP; dispositivos de redes; gerenciamento de redes; servidores de rede; tecnologias de redes; segurança de redes; Internet; intranet; extranet. 3 Copyright © 2007, ESAB – Escola Superior Aberta do Brasil Sobre o Autor Engenheiro eletrônico especializado nas áreas de Teleinformática e Telecomunicações. Mestrado e Doutorado outorgados pelo Instituto Tecnológico de Aeronáutica (ITA) em 1998 e 2004 respectivamente. A Tese de Mestrado rendeu o Primeiro premio "Comandante Quandt de Telecomunicações" na TELEXPO de São Paulo em 1999. Categoria: Trabalhos Técnicos. Autor de softwares na área de engenharia de tráfego, principalmente para medir, analisar e emular o comportamento agregado de pacotes IP. Autor de vários artigos técnicos apresentados em importantes congressos a nível nacional e internacional. Boa experiência no estudo, análise, dimensionamento e implementação de projetos na área de Teleinformática. 4 Copyright © 2007, ESAB – Escola Superior Aberta do Brasil SUMÁRIO UNIDADE 1 .............................................................................................................................. 8 Conceitos Gerais ................................................................................................................... 8 UNIDADE 2 ............................................................................................................................ 16 Sistemas Operacionais De Rede ........................................................................................ 16 UNIDADE 3 ............................................................................................................................ 39 Princípios De Telecomunicações (Parte I) .......................................................................... 39 UNIDADE 4 ............................................................................................................................ 65 Princípios De Telecomunicações (Parte II) ......................................................................... 65 UNIDADE 5 ............................................................................................................................ 79 Redes De Computadores (Parte I) ...................................................................................... 79 UNIDADE 6 ............................................................................................................................ 86 Redes De Computadores (Parte II) ..................................................................................... 86 UNIDADE 7 .......................................................................................................................... 101 Redes De Computadores (Parte III) .................................................................................. 101 UNIDADE 8 .......................................................................................................................... 112 Topologias De Rede.......................................................................................................... 112 UNIDADE 9 .......................................................................................................................... 125 Cabeamento De Redes (Parte I) ....................................................................................... 125 UNIDADE 10 ........................................................................................................................ 143 Cabeamento De Redes (Parte II) ...................................................................................... 143 UNIDADE 11 ........................................................................................................................ 161 Padrões Para Meios De Redes ......................................................................................... 161 UNIDADE 12 ........................................................................................................................ 164 Protocolos de Redes ......................................................................................................... 164 UNIDADE 13 ........................................................................................................................ 166 O Modelo OSI ................................................................................................................... 166 UNIDADE 14 ........................................................................................................................ 177 O Modelo TCP/IP (Parte I) ................................................................................................ 177 5 Copyright © 2007, ESAB – Escola Superior Aberta do Brasil UNIDADE 15 ........................................................................................................................ 185 O Modelo TCP/IP (Parte II) ............................................................................................... 185 UNIDADE 16 ........................................................................................................................ 189 O Modelo TCP/IP (Parte III) .............................................................................................. 189 UNIDADE 17 ........................................................................................................................ 196 Equipamentos De Rede (Parte I) ...................................................................................... 196 UNIDADE 18 ........................................................................................................................ 208 Equipamentos De Rede (Parte II) ..................................................................................... 208 UNIDADE 19 ........................................................................................................................ 217 Gerenciamento De Redes ................................................................................................. 217 UNIDADE 20 ........................................................................................................................ 224 Servidores De Rede (Parte I) ............................................................................................ 224 UNIDADE 21 ........................................................................................................................ 231 Servidores De Rede (Parte II) ........................................................................................... 231 UNIDADE 22 ........................................................................................................................ 239 Tecnologias De Redes (Parte I) ........................................................................................ 239 UNIDADE 23 ........................................................................................................................ 261 Tecnologias De Redes (Parte II) ....................................................................................... 261 UNIDADE 24 ........................................................................................................................ 274 Tecnologias De Redes (Parte III) ...................................................................................... 274 UNIDADE 25 ........................................................................................................................ 281 Segurança Em Redes (Parte I) ......................................................................................... 281 UNIDADE 26 ........................................................................................................................ 289 Segurança Em Redes (Parte II) ........................................................................................ 289 UNIDADE 27 ........................................................................................................................ 295 Segurança Em Redes (Parte III) ....................................................................................... 295 UNIDADE 28 ........................................................................................................................ 304 Internet .............................................................................................................................
Recommended publications
  • ATA User's Manual
    VoIP Analog Telephone Adapter VIP-156 VIP-157 User’s manual 1 Copyright Copyright (C) 2006 PLANET Technology Corp. All rights reserved. The products and programs described in this User’s Manual are licensed products of PLANET Technology, This User’s Manual contains proprietary information protected by copyright, and this User’s Manual and all accompanying hardware, software, and documentation are copyrighted. No part of this User’s Manual may be copied, photocopied, reproduced, translated, or reduced to any electronic medium or machine-readable form by any means by electronic or mechanical. Including photocopying, recording, or information storage and retrieval systems, for any purpose other than the purchaser's personal use, and without the prior express written permission of PLANET Technology. Disclaimer PLANET Technology does not warrant that the hardware will work properly in all environments and applications, and makes no warranty and representation, either implied or expressed, with respect to the quality, performance, merchantability, or fitness for a particular purpose. PLANET has made every effort to ensure that this User’s Manual is accurate; PLANET disclaims liability for any inaccuracies or omissions that may have occurred. Information in this User’s Manual is subject to change without notice and does not represent a commitment on the part of PLANET. PLANET assumes no responsibility for any inaccuracies that may be contained in this User’s Manual. PLANET makes no commitment to update or keep current the information in this User’s Manual, and reserves the right to make improvements to this User’s Manual and/or to the products described in this User’s Manual, at any time without notice.
    [Show full text]
  • Cisco ATA 192 Multiplatform Analog Telephone Adapter Data Sheet
    Data Sheet Cisco ATA 192 Multiplatform Analog Telephone Adapter The Cisco® ATA 192 Multiplatform Analog Telephone Adapter is a 2-port handset-to- Ethernet adapter that brings traditional analog devices into the IP world. Product Overview The Cisco ATA 192 Multiplatform Analog Telephone Adapter turns traditional telephone, fax, and overhead paging communications devices into IP devices for greater cost-effectiveness. Customers can take advantage of IP telephony applications by connecting their analog devices to Cisco analog telephone adapters. The ATA 192 is the preferred solution to address the needs of customers who connect to enterprise networks, small offices, or unified communications as a service from the cloud. It has two standard FXS ports, which can be configured independently as two Session Initiation Protocol (SIP) registrations. It also has two 100BASE-T ports with an integrated high-performance router to extend local network connectivity. With the ATA 192, customers can protect and extend their existing investment in analog systems, as well as smooth their migration to pure voice over IP in a more affordable and reliable way. The ATA 192 is designed to work with third-party call control systems and does not work with Cisco call control systems. Features and Benefits Feature Benefit Voice quality Offers clear, natural-sounding voice quality via advanced preprocessing, high-performance echo cancellation, voice activity detection, and comfort noise generation Cloud provisioning Enables zero-touch provisioning via TR-069 and XML configuration files Security Provides a complete security solution for both media and signaling Problem reporting (PRT) Improves serviceability with a dedicated PRT button for problem reporting and log collection IPv6 Enables IPv6 dual stack to help with migration to IPv6 Platform Support Information The Cisco ATA 192 Multiplatform Analog Telephone Adapter is designed to work with third-party call control systems.
    [Show full text]
  • SIP Analog Telephone Adapter Key Features
    VIP-156 SIP Analog Telephone Adapter Key Features PRODUCT FEATURES • Feature-rich telephone service over home or office Internet / Intranet connection • Web-Based and telephone keypad machine configuration • Remote administrator authentication • Easy access with PLANET Dynamic DNS • Voice prompt for machine configurations • Cost effective, field proven compatibility and stability Based on years of VoIP manufacturing experiences, PLANET Technology VoIP total solutions are known for advanced implementation of standard VOIP FEATURES based telephony with mass deployment capability. • SIP 2.0 (RFC3261) compliant • Peer-to-Peer / SIP proxy calls Cost-effective, easy-to-install and simple-to-use, the VIP-156 converts • Supports STUN, Outbound Proxy standard telephones to IP-based network communication. It supports • Up to 3 Proxy server registrations the service providers and enterprises enhance the traditional telephony communication services via the existing broadband connection to the • T.38 FAX transmission over IP network Internet or corporation network. • Call Hold / Forward / Transfer / Waiting • Incoming / Outgoing / Miss Call record With the VIP-156, home users and companies are able to save the • Local Phone book (Export / Upload) installation cost of voice-over-IP deployment and extend their past investments in telephones, conference and speakerphones. The VIP-156 • In band and out-of-band DTMF support can be the bridge between traditional analog systems and IP network • Voice codec support: G.711, G.723.1, G.729A, G.729B with an extremely affordable investment. • Voice processing: Voice Active Detection, DTMF detection / generation, G.168 echo cancellation (16mSec.), Comfort noise generation The VIP-156 and PLANET IP PBX system integration is the ideal application to your office daily communications.
    [Show full text]
  • HT813 FXS/FXO Port Analog Telephone Adaptors User Guide
    Grandstream Networks, Inc. HT813 FXS/FXO Port Analog Telephone Adaptors User Guide COPYRIGHT ©2021 Grandstream Networks, Inc. https://www.grandstream.com/ All rights reserved. Information in this document is subject to change without notice. Reproduction or transmittal of the entire or any part, in any form or by any means, electronic or print, for any purpose without the express written permission of Grandstream Networks, Inc. is not permitted. The latest electronic version of this user manual is available for download here: https://www.grandstream.com/support Grandstream is a registered trademark and Grandstream logo is trademark of Grandstream Networks, Inc. in the United States, Europe and other countries. CAUTION Changes or modifications to this product not expressly approved by Grandstream, or operation of this product in any way other than as detailed by this User Manual, could void your manufacturer warranty. WARNING Please do not use a different power adaptor with your devices as it may cause damage to the products and void the manufacturer warranty. P a g e | 1 HT813 User Guide Version 1.0.13.3 GNU GPL INFORMATION The firmware for the HT813 contains third-party software licensed under the GNU General Public License (GPL). Grandstream uses software under the specific terms of the GPL. Please see the GNU General Public License (GPL) for the exact terms and conditions of the license. Grandstream GNU GPL related source code can be downloaded from Grandstream web site from: https://blog.grandstream.com/faq/gnu-general-public-license/gnu-gpl-information-download P a g e | 2 HT813 User Guide Version 1.0.13.3 Table of Content DOCUMENT PURPOSE ................................................................................................
    [Show full text]
  • TR 102 633 V1.1.1 (2008-10) Technical Report
    ETSI TR 102 633 V1.1.1 (2008-10) Technical Report Corporate Networks (NGCN); Next Generation Corporate Networks (NGCN) - General 2 ETSI TR 102 633 V1.1.1 (2008-10) Reference DTR/ECMA-00352 Keywords IP, SIP ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16 Siret N° 348 623 562 00017 - NAF 742 C Association à but non lucratif enregistrée à la Sous-Préfecture de Grasse (06) N° 7803/88 Important notice Individual copies of the present document can be downloaded from: http://www.etsi.org The present document may be made available in more than one electronic version or in print. In any case of existing or perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF). In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive within ETSI Secretariat. Users of the present document should be aware that the document may be subject to revision or change of status. Information on the current status of this and other ETSI documents is available at http://portal.etsi.org/tb/status/status.asp If you find errors in the present document, please send your comment to one of the following services: http://portal.etsi.org/chaircor/ETSI_support.asp Copyright Notification No part may be reproduced except as authorized by written permission. The copyright and the foregoing restriction extend to reproduction in all media. © European Telecommunications Standards Institute 2008.
    [Show full text]
  • NENA Master Glossary of 9-1-1 Terminology
    NENA Master Glossary Of 9-1-1 Terminology NENA Master Glossary of 9-1-1 Terminology NENA 00-001, Version 16, August 22, 2011 Prepared by: National Emergency Number Association (NENA) Committee Chairs Published by NENA Printed in USA NENA Master Glossary of 9-1-1 Terminology NENA 00-001, Version 16, August 21, 2011 NENA STANDARDS NOTICE This NENA STANDARD is published by National Emergency Number Association (NENA) as a guide for the designers and manufacturers of systems that are used for the purpose of processing emergency calls. It is not intended to provide complete design specifications or parameters nor to assure the quality of performance of such equipment. NENA reserves the right to revise this NENA STANDARD for any reason including, but not limited to, conformity with criteria or standards promulgated by various agencies, utilization of advances in the state of the technical and operational arts or to reflect changes in the design of equipment or services described herein. It is possible that certain advances in technology or operations will precede these revisions. Therefore, this NENA STANDARD should not be the only source of information used. NENA members are advised to contact their Telecommunications Carrier representative to ensure compatibility with the 9-1-1 network. Patents may cover the specifications, techniques or network interface/system characteristics disclosed herein. No license expressed or implied is hereby granted. This document is not to be construed as a suggestion to any manufacturer to modify or change any of its products, nor does this document represent any commitment by NENA or any affiliate thereof to purchase any product whether or not it provides the described characteristics.
    [Show full text]
  • An Easy-To-Use 1 Port
    An easy-to-use 1 port ATA HT801 The HT801 is a single port analog telephone adapter (ATA) that allows users to create a high-quality and manageable IP telephony solution for residential and office environments. Its ultra-compact size, voice quality, advanced VoIP functionality, security protection and auto provisioning options enable users to take advantage of VoIP on analog phones. It also allows service providers to offer high quality IP service to their market. The HT801 is an ideal ATA for individual use as well as commercial IP voice deployments worldwide. Supports 1 SIP profile TLS and SRTP Automated Supports 3-way voice through a single FXS security encryption provisioning options conferencing port and a single technology to include TR-069 and 10/100Mbps port protect calls and XML config files accounts Failover SIP server Supports T.38 Fax for Supports a wide Use with automatically switches creating Fax-over-IP range of caller ID Grandstream’s UCM to secondary server formats series of IP PBXs for if main server loses Zero Configuration connection provisioning Supports advanced telephony features, including call transfer, call forward, call- waiting, do not disturb, message waiting indication, multi-language prompts, flexible dial plan and more www.grandstream.com Interfaces Telephone Interfaces One (1) FXS port Network Interfaces One (1) 10/100Mbps auto-sensing ethernet port (RJ45) LED Indicators POWER, INTERNET, PHONE Factory Reset Button Yes Voice, Fax, Modem Caller ID display or block, call waiting, flash, blind or attended
    [Show full text]
  • HT801/HT802 Analog Telephone Adaptors Administration Guide
    Grandstream Networks, Inc. HT801/HT802 Analog Telephone Adaptors Administration Guide COPYRIGHT ©2021 Grandstream Networks, Inc. http://www.grandstream.com All rights reserved. Information in this document is subject to change without notice. Reproduction or transmittal of the entire or any part, in any form or by any means, electronic or print, for any purpose without the express written permission of Grandstream Networks, Inc. is not permitted. The latest electronic version of this user manual is available for download here: http://www.grandstream.com/support Grandstream is a registered trademark and Grandstream logo is trademark of Grandstream Networks, Inc. in the United States, Europe and other countries. CAUTION Changes or modifications to this product not expressly approved by Grandstream, or operation of this product in any way other than as detailed by this User Manual, could void your manufacturer warranty. WARNING Please do not use a different power adaptor with your devices as it may cause damage to the products and -void the manufacturer warranty. P a g e | 1 HT801/HT802 Administration Guide Version 1.0.29.8 GNU GPL INFORMATION HT801/HT802 firmware contains third-party software licensed under the GNU General Public License (GPL). Grandstream uses software under the specific terms of the GPL. Please see the GNU General Public License (GPL) for the exact terms and conditions of the license. Grandstream GNU GPL related source code can be downloaded from Grandstream web site from: http://www.grandstream.com/support/faq/gnu-general-public-license/gnu-gpl-information-download P a g e | 2 HT801/HT802 Administration Guide Version 1.0.29.8 Table of Content DOCUMENT PURPOSE ................................................................................................
    [Show full text]
  • Cortelco ATA-100 Analog Telephone Adapter Technical Specifications
    TECHNICALTECHNICAL ATA-100 Analog Telephone PPPPrrrraaaaccccttttiiiicccceeee Adapter TTEELLEECCOOMMSSOOLLUUTTIIOIIONNSSFFOORRTTHHEE2211SSTTCCEENNTTUURRYY March 10, 2008 ProvideProvide anan IPIP NetworkNetwork ConnectionConnection forfor AnalogAnalog TelephoneTelephone DevicesDevices TheThe ATA-100 ATA-100isis an an analog analog telephone telephone adapter adapter thatthat connects connects an an analog analog telephone telephone device device to to anan IP IP network, network, enabling enabling SIP-supported SIP-supported VoIP VoIP communicationcommunication inin applicationsapplications wherewhere con-con- nectingnecting to to an an existing existing FXS FXS port port is is not not possible possible oror practical. practical. In In addition, addition, the the ATA-100 ATA-100hashas an an RJ-11RJ-11 port port for for switching switching to to the the PSTN PSTN analog analog phonephone network network via via touch touch tone tone commands. commands. DeviceDevice programming programming is is handled handled by by a a built-in built-in webweb browser. browser. IP IP address address assignment assignment can can be be accomplished accomplished either either by by DHCP DHCP or or by by man- man- uallyually assigning assigning a a static static IP IP address. address. The The ATA-100 ATA-100cancan be be used used with with or or without without SIP SIP regis- regis- tration.tration. If If unregistered, unregistered, the the ATA-100 ATA-100cancan perform perform basic basic tasks tasks like like sending sending voice voice data data to to anan IP-PBX IP-PBX or or to to another another device device on on a a LAN. LAN. SIP SIP registration registration opens opens up up an an impressive impressive list list ofof calling calling features features and and also also enables enables internet internet telephone telephone calling.
    [Show full text]
  • By CARLTON A. THOMPSON a DISSERTATION
    A DESIGN AND PERFORMANCE STUDY OF A DISTRIBUTED IP-BASED TELECOMMUNICATION SYSTEM (D-IPTS) By CARLTON A. THOMPSON A DISSERTATION PRESENTED TO THE GRADUATE SCHOOL OF THE UNIVERSITY OF FLORIDA IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF DOCTOR OF PHILOSOPHY UNIVERSITY OF FLORIDA 2016 © 2016 Carlton A. Thompson 2 To my mother Hyacinth Thompson and to the memory of my father Carlton Thompson, for always supporting me during my studies and work. 3 ACKNOWLEDGMENTS The path to PhD has been very challenging and I have achieved a milestone in my career. I learned a lot about the field of IP telecommunications, peformance analysis, and associated qualitative research methods. This dissertation would not have been written without the help of certain individuals. I would like to extend my gratitude towards my advisor Dr. Latchman and co-advisor Dr. McNair. They helped me with the selection of my topic and provided guidance during the writing of my dissertation. Their encouragement and insights have always been inspiring. In addition, none of this could have been possible without my family and loved ones providing their continuous support during my various course studies. Also, I would like to thank my friends and colleagues from the Electrical and Computer Engineering Department at the University of Florida. Finally, I would like to thank Texas Instruments ™ for providing financial support for this work. 4 TABLE OF CONTENTS page ACKNOWLEDGMENTS..................................4 LIST OF TABLES......................................9 LIST OF FIGURES..................................... 10 LIST OF ABBREVIATIONS ................................ 14 ABSTRACT......................................... 17 CHAPTER 1 INTRODUCTION .................................... 19 Motivation........................................ 20 Voice Networks..................................... 21 Traditional Telecommunications Networks..................
    [Show full text]
  • Ipnext 700™ NGN IP-PBX High-Performance Next Generation IP-PBX Solution
    IPNext 700™ NGN IP-PBX High-performance Next Generation IP-PBX Solution AddPac Technology 2006, Sales and Marketing www.addpac.com V2oIP Internetworking Solution AddPac VoIP Media Gateway SIP Proxy Server (Multiple E1/T1) WAN, Internet RAS AddPac PSTN VPMS (ATM, FR, IP Network) Note Book Phone AddPac LAN AddPac Embedded VoIP Dial-up Gateway GateKeeper AddPac ATM Router Phone FAX AddPac AddPac FAX FAX VoIP Gateway AddPac AddPac VoIP Router (1~2 Ports) VPN Gateway Metro Ethernet AddPac Phone AddPac Switch ATM Metro Phone Ethernet Switch AddPac WAN Router FAX FAX Multi-service FAX Router LAN Phone AddPac FAX Phone Phone VoIP Gateway LAN PBX (4~8 Ports) AddPac Phone FoIP Broadcasting AddPac VPN Gateway System AddPac AddPac LAN Phone Phone VBMS VPN Gateway AddPac AddPac Speaker VoIP Gateway Phone Note Book AddPac VoIP Gateway (4~8 Ports) (Digital E1/T1) Phone VoIP Gateway (1~2 Ports) Amp. Phone Phone AddPac AddPac AddPac AddPac FAX Voice Broadcasting AddPac Voice Broadcasting L2 Ethernet Switch L2 Ethernet Switch System L2 Ethernet Switch FAX Terminal FAX AddPac AddPac Phone IP PBX IP Phone PC PC AddPac Phone VoIP Gateway AddPac (4 Ports) LAN LAN Call Manager FAX Phone AddPac AddPac FAX Voice Broadcasting AddPac IP Phone FAX Speaker Terminal AddPac IP Video Codec NGN VoIP Gateway AddPac AddPac (8~16 Ports) Video Gateway Amp. NGN VoIP Gateway Phone (16~64 Ports) Speaker PC Speaker FAX Phone AddPac Amp. IP Phone Amp. Video AddPac Video Speaker Phone Input Video AddPac IP Phone Phone Display Video Phone Phone Input IP Phone Phone Display Amp.
    [Show full text]
  • Real-Time Transport of Internet Telephony Service Utilizing Embedded Resource-Constrained Systems Kyle Persohn Marquette University
    Marquette University e-Publications@Marquette Master's Theses (2009 -) Dissertations, Theses, and Professional Projects Real-Time Transport of Internet Telephony Service Utilizing Embedded Resource-Constrained Systems Kyle Persohn Marquette University Recommended Citation Persohn, Kyle, "Real-Time Transport of Internet Telephony Service Utilizing Embedded Resource-Constrained Systems" (2012). Master's Theses (2009 -). Paper 162. http://epublications.marquette.edu/theses_open/162 REAL-TIME TRANSPORT OF INTERNET TELEPHONY SERVICE UTILIZING EMBEDDED RESOURCE-CONSTRAINED SYSTEMS by Kyle Persohn A Thesis Submitted to the Faculty of the Graduate School, Marquette University, in Partial Fulfillment of the Requirements for the Degree of Master of Science Milwaukee, Wisconsin August 2012 ABSTRACT REAL-TIME TRANSPORT OF INTERNET TELEPHONY SERVICE UTILIZING EMBEDDED RESOURCE-CONSTRAINED SYSTEMS Kyle Persohn Marquette University, 2012 This thesis presents a real-time framework for resource-constrained devices that improves the listening quality of Voice over Internet Protocol calls transported over congested networks. Many VoIP standards and implementations exist, but gaps in the design space encourage further exploration that previous work fails to address. We describe an experimental hardware platform that expands upon a previous design to accommodate technical research and educational needs. Our framework, based on the Real-Time Transport Protocol, integrates closely with existing software constructs available in the Embedded Xinu operating system. We offer features derived from RTP by means of a kernel device that alleviates an application from directly interacting with the underlying protocol. An example application based on Xinu's RTP implementation demonstrates measurable robustness to packet loss and delay variation (jitter)|adverse conditions affecting networks used for VoIP, such as the Internet.
    [Show full text]