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.
Wi Fi Telephony
Wi-Fi telephony is the latest, most cost effective, and clearest way of carrying voice data wirelessly. The great news is that it can be integrated seamlessly into the same infrastructures as currently used for computer and telephone data.The digital quality is far above current cellular technologies. This book will be among the first to discuss Session Initiation Protocol (SIP), Quality of Service (QoS), and interoperability in connection with Wi-Fi telephony. Security challenges are also presented and solved along these malleable wireless boundaries. In short, this book provides all the information necessary for effective, reliable, crystal clear Wi-Fi telephony service and implementation. *Using current telephone and computer infrastructure this technology can be implemented at low cost *The importance of Quality of Service (QoS) and security of Wi-Fi telephony is considered *Enhances the clarity of a call beyond a basic cellular phone using digital data transfer
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.
JUNOS Enterprise Routing
Written by the instructors and creators of the JNTCP-ER Certification Exams, JUNOS Enterprise Routing is the only comprehensive book for Juniper enterprise and edge routing environments. It offers complete coverage of all the services available to the JUNOS administrator, including JUNOS Enhanced Services (ES). This book is the official study guide for all three Juniper Enterprise Routing certification exams, and is highly recommended reading to pass the exams. With its field-guide emphasis on practical solutions, you can easily take the book beyond the classroom and into working networks as a design, maintenance, and troubleshooting reference par excellence. JUNOS Enterprise Routing covers all three certification exams in this track: Juniper Networks Certified Internet Associate (JNCIA-ER) Juniper Networks Certified Internet Specialist (JNCIS-ER) Juniper Networks Certified Internet Expert (JNCIE-ER) With more services such as voice, conference, and multicast on the IP router platform, the market for enterprise routers is growing exponentially, and the need for certified engineers to keep up with network developments in protocols and security is paramount. For everyone who works with Juniper enterprise and edge routing environments, this is a must-have book.
This revised and updated edition integrates the latest in modern technology with traditional cartographic principles. While providing a solid conceptual foundation in cartographic methodology, the text also introduces the very latest advances that have greatly influenced cartographic techniques. The new edition reflects the increasing importance of cartography as the basis for further geographical study, the text has been updated throughout and chapters on the latest developments in cartography have been integrated. There is also a more widespread emphasis on multimedia and the web.
Design and Validation of Computer Protocols
This volume discusses the fundamental problems of designing logically consistent methods of communication between multiple computer processes. Standard protocol design problems, such as error control and flow control, are covered in detail, but also structured design methods and the construction of formal validation models. The book contains complete listings and explanations of new protocol validation and design tool called SPIN. Author is in charge of protocol design at Bell Labs. Professionals who bought Tanenbaum's COMPUTER NETWORKS, 2/E and Comer's TCP/IP will buy this. This is the first book to cover automated protocol design and validation tools extensively.
Professional Microsoft SQL Server 2014 Administration
Learn to take advantage of the opportunities offered by SQL Server 2014 Microsoft's SQL Server 2014 update means big changes for database administrators, and you need to get up to speed quickly because your methods, workflow, and favorite techniques will be different from here on out. The update's enhanced support of large-scale enterprise databases and significant price advantage mean that SQL Server 2014 will become even more widely adopted across the industry. The update includes new backup and recovery tools, new AlwaysOn features, and enhanced cloud capabilities. In-memory OLTP, Buffer Pool Extensions for SSDs, and a new Cardinality Estimator can improve functionality and smooth out the workflow, but only if you understand their full capabilities. Professional Microsoft SQL Server 2014 is your comprehensive guide to working with the new environment. Authors Adam Jorgensen, Bradley Ball, Ross LoForte, Steven Wort, and Brian Knight are the dream team of the SQL Server community, and they put their expertise to work guiding you through the changes. Improve oversight with better management and monitoring Protect your work with enhanced security features Upgrade performance tuning, scaling, replication, and clustering Learn new options for backup and recovery Professional Microsoft SQL Server 2014 includes a companion website with sample code and efficient automation utilities, plus a host of tips, tricks, and workarounds that will make your job as a DBA or database architect much easier. Stop getting frustrated with administrative issues and start taking control. Professional Microsoft SQL Server 2014 is your roadmap to mastering the update and creating solutions that work.
Clear and to the Point
True or False? Most PowerPoint presentations are: ?compelling ?illuminating ?informative ?clear and to the point Answer: False Make a change following the principles of Stephen Kosslyn: ?a world authority on the visual brain ?a clear and engaging writer Making PowerPoint presentations that are clear, compelling, memorable, and even enjoyable is not an obscure art. In this book, Stephen Kosslyn, a renowned cognitive neuroscientist, presents eight simple principles for constructing a presentation that takes advantage of the information modern science has discovered about perception, memory, and cognition. Using hundreds of images and sample slides, he shows the common mistakes many people make and the simple ways to fix them. For example, never use underlining to emphasize a word--the line will cut off the bottom of letters that have descending lines (such as p and g), which interferes with the brain's ability to recognize text. Other tips include why you should state your conclusion at the beginning of a presentation, when to use a line graph versus a bar graph, and how to use color correctly. By following Kosslyn's principles, anyone will be able to produce a presentation that works!