Elastix Unified Communications Server Cookbook

Elastix Unified Communications Server Cookbook
Author: Gerardo Barajas Puente
Publisher: Packt Publishing Ltd
Total Pages: 348
Release: 2015-03-31
Genre: Computers
ISBN: 1849519358

This book is aimed at those who want to learn how to set up an Elastix Unified Communications Server without losing ground on Unified Communications and Voice over IP.

Asterisk: The Definitive Guide

Asterisk: The Definitive Guide
Author: Russell Bryant
Publisher: "O'Reilly Media, Inc."
Total Pages: 1011
Release: 2013-05-10
Genre: Computers
ISBN: 1449332455

Design a complete Voice over IP (VoIP) or traditional PBX system with Asterisk, even if you have only basic telecommunications knowledge. This bestselling guide makes it easy, with a detailed roadmap that shows you how to install and configure this open source software, whether you’re upgrading your existing phone system or starting from scratch. Ideal for Linux administrators, developers, and power users, this updated edition shows you how to write a basic dialplan step-by-step, and brings you up to speed on the features in Asterisk 11, the latest long-term support release from Digium. You’ll quickly gain working knowledge to build a simple yet inclusive system. Integrate Asterisk with analog, VoIP, and digital telephony systems Build an interactive dialplan, using best practices for more advanced features Delve into voicemail options, such as storing messages in a database Connect to external services including Google Talk, XMPP, and calendars Incorporate Asterisk features and functions into a relational database to facilitate information sharing Learn how to use Asterisk’s security, call routing, and faxing features Monitor and control your system with the Asterisk Manager Interface (AMI) Plan for expansion by learning tools for building distributed systems

Excel 2007 VBA Programming For Dummies

Excel 2007 VBA Programming For Dummies
Author: John Walkenbach
Publisher: John Wiley & Sons
Total Pages: 404
Release: 2011-02-08
Genre: Computers
ISBN: 1118050800

Step-by-step instructions for creating VBA macros Harness the power of VBA and create custom Excel applications Make Excel 2007 work for you! This clear, nonintimidating guide shows you how to use VBA to create Excel apps that look and work the way you want. Packed with plenty of sample programs, it explains how to work with range objects, control program flow, develop custom dialog boxes, create custom toolbars and menus, and much more. Discover how to Grasp essential programming concepts Use the Visual Basic Editor Navigate the new Excel user interface Communicate with your users Deal with errors and bugs

Modulation and Coding Techniques in Wireless Communications

Modulation and Coding Techniques in Wireless Communications
Author: Evgenii Krouk
Publisher: John Wiley & Sons
Total Pages: 691
Release: 2011-02-21
Genre: Technology & Engineering
ISBN: 0470745053

The high level of technical detail included in standards specifications can make it difficult to find the correlation between the standard specifications and the theoretical results. This book aims to cover both of these elements to give accessible information and support to readers. It explains the current and future trends on communication theory and shows how these developments are implemented in contemporary wireless communication standards. Examining modulation, coding and multiple access techniques, the book is divided into two major sections to cover these functions. The two-stage approach first treats the basics of modulation and coding theory before highlighting how these concepts are defined and implemented in modern wireless communication systems. Part 1 is devoted to the presentation of main L1 procedures and methods including modulation, coding, channel equalization and multiple access techniques. In Part 2, the uses of these procedures and methods in the wide range of wireless communication standards including WLAN, WiMax, WCDMA, HSPA, LTE and cdma2000 are considered. An essential study of the implementation of modulation and coding techniques in modern standards of wireless communication Bridges the gap between the modulation coding theory and the wireless communications standards material Divided into two parts to systematically tackle the topic - the first part develops techniques which are then applied and tailored to real world systems in the second part Covers special aspects of coding theory and how these can be effectively applied to improve the performance of wireless communications systems

Asterisk

Asterisk
Author: Jim Van Meggelen
Publisher: "O'Reilly Media, Inc."
Total Pages: 602
Release: 2007-08-28
Genre: Computers
ISBN: 0596510489

Provides information on Asterisk, an open source telephony application.

Webmin Administrator's Cookbook

Webmin Administrator's Cookbook
Author: Michał Karzyński
Publisher: Packt Publishing Ltd
Total Pages: 591
Release: 2014-03-26
Genre: Computers
ISBN: 1849515859

Written in a cookbook format with practical recipes this book helps you to perform various administrative tasks using Webmin and enables you to perform common jobs more efficiently. This book is perfect for System administrators who want to learn more advanced concepts of Webmin and how it can help to set up a server for development, testing or deployment.

Wireless Communications

Wireless Communications
Author: William Webb
Publisher: John Wiley & Sons
Total Pages: 274
Release: 2007-01-30
Genre: Technology & Engineering
ISBN: 0470065133

The definitive assessment of how wireless communications will evolve over the next 20 years. Predicting the future is an essential element for almost everyone involved in the wireless industry. Manufacturers predict the future when they decide on product lines to develop or research to undertake, operators when they buy licences and deploy networks, and academics when they set PhD topics. Wireless Communications: The Future provides a solid, clear and well-argued basis on which to make these predictions. Starting with a description of the current situation and a look at how previous predictions made in 2000 have fared, the book then provides the contributions of six eminent experts from across the wireless industry. Based on their input and a critical analysis of the current situation, it derives detailed forecasts for 2011 through to 2026. This leads to implications across all of the different stakeholders in the wireless industry and views on key developments. Presents clear and unambiguous predictions, not a range of scenarios from which the user has to decide Includes chapters covering existing wireless systems which provide solid tutorial material across a wide range of wireless devices Offers a range of views of the future from high profile contributors in various areas of the industry and from around the globe, including contributions from Vodafone and Motorola Provides a comprehensive guide to current technologies, offering keen analysis of key drivers, end user needs and key economic and regulatory constraints This book, compiled by a renowned author with a track record of successful prediction, is an essential read for strategists working for wireless manufacturers, wireless operators and device manufacturers, regulators and professionals in the telecoms industry, as well as those studying the topic or with a general interest in the future of wireless communications.

The Handbook of Ad Hoc Wireless Networks

The Handbook of Ad Hoc Wireless Networks
Author: Mohammad Ilyas
Publisher: CRC Press
Total Pages: 975
Release: 2017-12-19
Genre: Technology & Engineering
ISBN: 1351836153

A relative newcomer to the field of wireless communications, ad hoc networking is growing quickly, both in its importance and its applications. With rapid advances in hardware, software, and protocols, ad hoc networks are now coming of age, and the time has come to bring together into one reference their principles, technologies, and techniques. The Handbook of Ad Hoc Wireless Networks does exactly that. Experts from around the world have joined forces to create the definitive reference for the field. From the basic concepts, techniques, systems, and protocols of wireless communication to the particulars of ad hoc network routing methods, power, connections, traffic management, and security, this handbook covers virtually every aspect of ad hoc wireless networking. It includes a section that explores several routing methods and protocols directly related to implementing ad hoc networks in a variety of applications. The benefits of ad hoc wireless networks are many, but several challenges remain. Organized for easy reference, The Handbook of Ad Hoc Wireless Networks is your opportunity to gain quick familiarity with the state of the art, have at your disposal the only complete reference on the subject available, and prepare to meet the technological and implementation challenges you'll encounter in practice.

Wireless Network Security

Wireless Network Security
Author: Yang Xiao
Publisher: Springer Science & Business Media
Total Pages: 423
Release: 2007-12-29
Genre: Computers
ISBN: 0387331123

This book identifies vulnerabilities in the physical layer, the MAC layer, the IP layer, the transport layer, and the application layer, of wireless networks, and discusses ways to strengthen security mechanisms and services. Topics covered include intrusion detection, secure PHY/MAC/routing protocols, attacks and prevention, immunization, key management, secure group communications and multicast, secure location services, monitoring and surveillance, anonymity, privacy, trust establishment/management, redundancy and security, and dependable wireless networking.