VoIP et ToIP Asterisk
Ce livre sur la voix sur IP (VoIP et ToIP) est destiné aux acteurs du domaine des systèmes, réseaux et télécoms d'entreprises, ainsi qu'à toute personne souhaitant découvrir et comprendre ce domaine de la Voix sur IP. Il s'adresse également aux décideurs informatiques qui doivent faire évoluer leur architecture de téléphonie. Il permet de détailler toutes les étapes de la mise en place de l'autocom Open Source Asterisk, de la conception-architecture à la mise en production. La démarche progressive des différents chapitres permet d'aborder toutes les étapes indispensables pour mettre en production une T-VoIP autour d'Asterisk : du choix de l'architecture cible à la mise en œuvre d'un call center, en passant par l'installation du serveur, le choix des passerelles opérateurs, la nécessaire préparation du réseau, la mise en place d'un plan de numérotation éprouvé, l'interconnexion de sites distants et l'utilisation potentielle d'outils supplémentaires pour enrichir les fonctionnalités du PBX. Tous les sujets sont présentés avec de nombreux exemples pratiques. Des connaissances sur l'administration d'un système Linux sont souhaitables pour tirer le meilleur profit de cet ouvrage.
Provides information on Asterisk, an open source telephony application.
Cisco IP Telephony
A guide to successful deployment of the Cisco IP Telephony solution Real-world case studies from the Cisco design consulting engineers who developed the PDIOO process provide practical advice on all stages of successful IPT deployment Concise understanding of the PDIOO phases enables architects and engineers to successfully deploy the Cisco IPT solution Division of the process into PDIOO phases provides a logical and defined guide for network engineers and architects as they proceed through each of the phases in deploying the Cisco IPT solution Includes detailed questionnaires for each phase of deployment in the PDIOO cycle—a great aid in understanding customer networks and requirements Network infrastructure design, call processing infrastructure design and applications, and voice-mail system design are covered in depth Cisco® IP Telephony (IPT) solutions are being deployed at an accelerated rate, and network architects and engineers need to understand the various phases involved in successful deployment: planning, design, implementation, operation, and optimization (PDIOO). On the road to that understanding, those involved need to collect information for each phase of deployment, and then follow through with the best architecture, deployment model, and implementation based on the data collected. Cisco IP Telephony: Planning, Design, Implementation, Operation, and Optimization is a guide for network architects and engineers as they deploy the Cisco IPT solution. With this book, you will master the PDIOO phases of the IPT solution, beginning with the requirements necessary for effective planning of a large-scale IPT network. From there, you’ll follow a step-by-step approach to choose the right architecture and deployment model. Real-world examples and explanations with technical details, design tips, network illustrations, and sample configurations illustrate each step in the process of planning, designing, implementing, operating, and optimizing a chosen architecture based on information you have collected. In-depth instruction on each PDIOO phase provides specific details about the tasks involved and best practices for successful implementation of the IPT solution. This book also contains predesigned questionnaires and PDIOO assistance tools that help you determine the requirements of each phase of the PDIOO cycle. Authors Ramesh Kaza and Salman Asadullah have been involved with Cisco IPT solutions from the beginning and have planned, designed, and implemented major IPT networks using the guidelines found here. Cisco IP Telephony: Planning, Design, Implementation, Operation, and Optimization provides the step-by-step explanations, details, and best practices acquired by the authors while working with the top Cisco IPT customers. This book is part of the Networking Technology Series from Cisco Press®, which offers networking professionals valuable information for constructing efficient networks, understanding new technologies, and building successful careers.
La voix sur LTE R seau 4G et architecture IMS
La voix sur LTE (Long Term Evolution) présente les mécanismes mis en oeuvre dans le réseau de mobiles 4G pour le transport de paquets IP contenant la voix et la signalisation téléphonique, ainsi que les technologies utilisées pour la fourniture du service téléphonique dans le réseau IMS (IP Multimedia Sub-system). Malgré la difficulté liée au handover du réseau 4G vers le réseau 2G/3G, l’établissement d’une communication téléphonique ne sera pas réalisé sur un réseau 4G. Cet ouvrage analyse les technologies mises en oeuvre, comme le CSFB, solution d’attente qui permet à un mobile attaché au réseau 4G de recevoir une alerte (paging) transmise par le réseau 2G/3G. Le protocole SIP sur lequel se base la signalisation téléphonique transférée par le réseau 4G, le réseau IMS qui fournit le service et définit le routage, le mécanisme SRVCC qui assure le maintien de la communication et le serveur d’applications TAS, sont également développés. L’auteur Consultant et formateur en réseaux et télécommunications, intervient auprès des industriels et des opérateurs sur des études d’architecture. Il anime des formations sur les réseaux 4G et IMS pour NEXCOM.
We hold newborn babies and believe we look into eyes of innocence—lives undefeated by mortal existence. Children grow; life gets complicated. Innocence erodes. We hold someone with Alzheimer’s and believe we look into eyes of fear. Lifetime memories fade like shadows, a decade at a time. Lives are lived in reverse. Alzheimer’s attacks its innocent victims. But it doesn’t defeat innocence. Those who have it seemingly return to being a young child and regain simplicity. Physical life ends like it began and returns to undefeated innocence. From broken memories to broken bones, Alzheimer’s catalyzed terror and defeat in my family. My parents were terrorized by the scrambling of their minds. We who loved them had to suffocate our feelings of defeat as they returned to innocence. As a caregiver, God allowed me to share in my parents’ passages back to undefeated innocence. I gained loving moments that I would have missed if I hadn’t been involved and if I hadn’t taken up the proper vantage point to see them. Undefeated Innocence offers hope to caregivers by weaving poignant personal experiences, humor, and biblical stories with a study of the Beatitudes. It answers “Where is God?” in Alzheimer’s. It confirms that caregiving experiences are abnormally normal, and it’s okay to store toothpaste in an underwear drawer. Undefeated Innocence reveals God’s grace through the storms and affirms that caregivers are not alone in wondering if life can return to a place of peace.
Image and Video Compression Standards
New to the Second Edition: offers the latest developments in standards activities (JPEG-LS, MPEG-4, MPEG-7, and H.263) provides a comprehensive review of recent activities on multimedia enhanced processors, multimedia coprocessors, and dedicated processors, including examples from industry. Image and Video Compression Standards: Algorithms and Architectures, Second Edition presents an introduction to the algorithms and architectures that form the underpinnings of the image and video compressions standards, including JPEG (compression of still-images), H.261 and H.263 (video teleconferencing), and MPEG-1 and MPEG-2 (video storage and broadcasting). The next generation of audiovisual coding standards, such as MPEG-4 and MPEG-7, are also briefly described. In addition, the book covers the MPEG and Dolby AC-3 audio coding standards and emerging techniques for image and video compression, such as those based on wavelets and vector quantization. Image and Video Compression Standards: Algorithms and Architectures, Second Edition emphasizes the foundations of these standards; namely, techniques such as predictive coding, transform-based coding such as the discrete cosine transform (DCT), motion estimation, motion compensation, and entropy coding, as well as how they are applied in the standards. The implementation details of each standard are avoided; however, the book provides all the material necessary to understand the workings of each of the compression standards, including information that can be used by the reader to evaluate the efficiency of various software and hardware implementations conforming to these standards. Particular emphasis is placed on those algorithms and architectures that have been found to be useful in practical software or hardware implementations. Image and Video Compression Standards: Algorithms and Architectures, emSecond Edition uniquely covers all major standards (JPEG, MPEG-1, MPEG-2, MPEG-4, H.261, H.263) in a simple and tutorial manner, while fully addressing the architectural considerations involved when implementing these standards. As such, it serves as a valuable reference for the graduate student, researcher or engineer. The book is also used frequently as a text for courses on the subject, in both academic and professional settings.
Create Your Own Website
Build a great personal or business website… absolutely no experience needed! -Family sites -Hobby sites -Community and nonprofit sites -Online storefronts that accept credit card payments via PayPal -Post video on YouTube 8 Easy Projects In this book you’ll see just how easy it is to create your own website. Use easy web-based services to: -Sell products at your own eBay Store -Create your own personal or professional blog -Display your digital photos on your own Snapfish site -Share your videos on YouTube -Create a MySpace page that’ll stand out from the crowd -Build your social network with your own Facebook presence You won’t believe how easy it is to build your own site...or how much fun!
Linux Starter Kit
A starter kit for Linux covers all the fundamental features of the product, including installation, system administration, and troubleshooting, and is accompanied by the the latest software version of Linux.
ORACLE 11G: SQL is not simply a study guide; it is written for individuals who have just a basic knowledge of databases and can be utilized in a course on this latest implementation of SQL from Oracle.
Microsoft Lync 2013 Unified Communications From Telephony to Real Time Communication in the Digital Age
This is a tutorial guide to gain in-depth knowledge such as realizing projects to migrate traditional telephony to Unified Communications inside an organization.This book is targeted at three audiences: business decision makers, technical advocates, and IT decision makers. As this is also a fundamental book on real time collaboration technology, it is also suitable for anyone who is interested in the future of communications.