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Asterisk™: The Future of Telephony
by Jim Van Meggelen Jared Smith Leif MadsenAsterisk allows users to implement flexible dialplans that support almost any telephony application, but its flexibility can make it difficult to install. This reference offers a complete roadmap for installing, configuring and integrating Asterisk with existing phone systems. It outlines all options and instructs readers in establishing voicemail, call conferencing, interactive voice response and other services and explains the underlying concepts of a basic dial plan.
Asterisk: The Future of Telephony
by Jim Van Meggelen Jared Smith Leif MadsenThis bestselling book is now the standard guide to building phone systems with Asterisk, the open source IP PBX that has traditional telephony providers running scared! Revised for the 1.4 release of the software, the new edition of Asterisk: The Future of Telephony reveals how you can save money on equipment and support, and finally be in control of your telephone system.If you've worked with telephony in the past, you're familiar with the problem: expensive and inflexible systems that are tuned to the vendor's needs, not yours. Asterisk isn't just a candle in the darkness, it's a whole fireworks show. Because Asterisk is so powerful, configuring it can seem tricky and difficult. This book steps you through the process of installing, configuring, and integrating Asterisk with your existing phone system.You'll learn how to write dialplans, set up applications including speech synthesis and voice recognition, how to script Asterisk, and much more -- everything you need to design a simple but complete system with little or no Asterisk experience, and no more than rudimentary telecommunications knowledge. The book includes:A new chapter on managing/administering your Asterisk systemA new chapter on using Asterisk with databases Coverage of features in Asterisk 1.4A new appendix on dialplan functionsA simplified installation chapterNew simplified SIP configuration, including examples for several popular SIP clients (soft phones and IP telephones)Revised chapters and appendicies reviewed and updated for the latest in features, applications, trends and best-practicesAsterisk is revolutionizing the telecom industry, due in large part to the way it gets along with other network applications. While other PBXs are fighting their inevitable absorption into the network, Asterisk embraces it. If you need to take control of your telephony systems, move to Asterisk and see what the future of telecommunications looks like.
Asterisk 1.4: The Professional’s Guide
by Colman Carpenter David DuffettEmploying a comprehensive handbook-style approach, this easy-to-follow book shows the reader various means of implementing the power of Asterisk in a commercial environment. In next to no time, the reader will gain a deeper understanding of many of the issues faced by Asterisk consultants and the solutions they believe work best. Primarily aimed at Asterisk Professionals, this book provides real-world insight for Asterisk Network Administrators and System Implementers in the commercial environment. This book is not for newcomers to Asterisk. Readers are expected to be experienced with installing and administering Asterisk systems.
Asterisk 1.6
by Barrie Dempster David GomillionThe book offers readers both a detailed description as well as step by step instructions on deploying software solutions as well as Asterisk configurations. Screenshots are provided in sections to give a visual perspective of the instructions. For Asterisk configurations actual sample code is listed in the book which can be directly inserted into your Asterisk solution.This book is aimed at anyone who is interested in building a powerful telephony system using the free and open source application, Asterisk, without spending many thousands of dollars buying a commercial and often less flexible system. This book is suitable for the novice and those new to Asterisk and telephony. Telephony or Linux experience will be helpful, but not required.
Asterisk Cookbook: Solutions to Everyday Telephony Problems
by Leif Madsen Russell BryantAsterisk has a wealth of features to help you customize your PBX to fill very specific business needs. This short cookbook offers recipes for tackling dialplan fundamentals, making and controlling calls, and monitoring channels in your PBX environment. Each recipe includes a simple code solution you can put to work immediately, along with a detailed discussion that offers insight into why and how the recipe works.This book focuses on Asterisk 1.8, although many of the conventions and information presented are version-agnostic. These recipes include solutions to help you:Authenticate callers before moving on in your dialplanRedirect calls received by your auto-attendantCreate an automatic call-back serviceInitiate hot-desking to login to and accept calls at any office deviceMonitor and interrupt live calls to train new employees at a call centerRecord calls from your Asterisk dialplan
Asterisk Gateway Interface 1.4 and 1.6 Programming
by Nir SimionovichThis friendly, clear tutorial takes a pragmatic approach to developing Asterisk applications, helping you to find the best solutions for your needs. Unlike most books, which simply show you how to do or what to do, this book tries to show you: "why to do?"--thus explaining the logic behind certain Asterisk development paradigms. This book is intended for developers wishing to utilize Asterisk, system administrators wishing to gain better control over their Asterisk installation, and telephony service providers wishing to deploy Asterisk-based solutions to their infrastructure. You are expected to have some experience with Asterisk and a basic understanding of programming. No knowledge of Asterisk programming is required.
AsteriskNOW
by Nir SimionovichThis book is for complete beginners who are interested in setting up their own telephony system and are overwhelmed with the configuration options in Asterisk. It shows how to install and configure AsteriskNow and configure the required dial plan.
Asterix: Album 40
by FabcaroPre-order the latest adventure from our indomitable hero and his friends!A strange new philosophy is gaining popularity amongst the Roman soldiers. When its enchanting influence reaches the Gauls, everything they once held dear is turned upside down.
Asterix and the Griffin: Album 39 (Asterix #39)
by Jean-Yves FerriBe the first to read the next action-packed adventure from the indomitable Gauls by pre-ordering now!Follow Asterix and Obelix as they set out on their 39th adventure on a long journey in search of a strange and terrifying creature. Half-eagle, half-lion, and idolised and feared by ancient peoples, this creature is the griffin.How will Asterix, Obelix, Dogamatix, along with the Druid Getafix, get drawn into the epic, perilous quest to find this fantastical animal? Find out in the next instalment of this multi-million bestselling series.
The Asteroid Excursion (Mr. Kazarian, Alien Librarian)
by Steve FoxeScreech! Some major interference is coming through on Walden's hearing aid. But it's not the local radio station--it's a cry for help from the alien colonists called Arrok! Their home has been blasted apart by an asteroid. Can Mr. K and his students help? Will the same thing happen to Earth? And will the citizens of Arrok demand that Dani stay and serve as their leader? There's never a dull moment in Mr. Kazarian's spaceship . . . er, "library"! A science-fiction graphic adventure with lots of actual science--and lots of fun!
Asteroid Forma
by Rand Le Page Denis HughesThe Galaxy is a big place, made up of thousands of millions of worlds, and the work of exploration will probably never be entirely completed. But various systems within the Galaxy, each with its own particular humanoid race if intelligent beings, have joined in galactic federation for the mutual good of all concerned. Once major snag remained: speedy communication. When space travel velocities were increased by the introduction of 5C drive on all but local planetary working vessels the way was opened to enormously expanded regions of movement. Piet Tek, captain of a space tramp, tells of what happened when the secret of instantaneous communication was prematurely exploited by unscrupulous people in search of power.
Asteroid Forma
by Rand Le Page Denis HughesThe Galaxy is a big place, made up of thousands of millions of worlds, and the work of exploration will probably never be entirely completed. But various systems within the Galaxy, each with its own particular humanoid race if intelligent beings, have joined in galactic federation for the mutual good of all concerned. Once major snag remained: speedy communication. When space travel velocities were increased by the introduction of 5C drive on all but local planetary working vessels the way was opened to enormously expanded regions of movement. Piet Tek, captain of a space tramp, tells of what happened when the secret of instantaneous communication was prematurely exploited by unscrupulous people in search of power.
The Asteroid Hunter: A Scientist's Journey to the Dawn of our Solar System
by Dante LaurettaFEATURED IN THE NEW YORK TIMES, NPR&’S SCIENCE FRIDAY, THE WASHINGTON POST, AND SCIENCE MAGAZINE A &“brilliant account of a 21st century real-life fantasy&” (Sir Brian May) of space exploration and a lesson in fragility in the quest to return an asteroid sample and unlock the mystery of formation of life on earth, braided with the remarkable life story of the OSIRIS-REx mission leader, Dr. Dante Lauretta. On September 11, 1999, humanity made a monumental discovery in the vastness of space. Scientists uncovered an asteroid of immense scientific importance—a colossal celestial entity. As massive as an aircraft carrier and towering as high as the iconic Empire State Building, this cosmic titan was later named Bennu. Remarkable for much more than its size, Bennu belonged to a rare breed of asteroids capable of revealing the essence of life itself. But just as Bennu became a beacon of promise, researchers identified a grave danger. Hurtling through space, it threatens to collide with our planet on September 24, 2182. Leading the expedition was Dr. Dante Lauretta, the Principal Investigator of NASA's audacious OSIRIS-REx Asteroid Sample Return Mission. Tasked with unraveling Bennu's mysteries, his team embarked on a daring quest to retrieve a precious sample from the asteroid's surface — one that held the potential to not only unlock the secrets of life's origins but also to avert an unprecedented catastrophe. A tale of destiny and danger, The Asteroid Hunter chronicles the high-stakes mission firsthand, narrated by Dr. Lauretta. It offers readers an intimate glimpse into the riveting exploits of the mission and Dr. Lauretta's wild, winding personal journey to Bennu and back. Peeling back the curtain on the wonders of the cosmos, this enthralling account promises a rare glimpse into the tightly woven fabric of scientific exploration, where technical precision converges with humanity&’s profound curiosity and indominable spirit.
Asteroid Hunters (Ted Bks.)
by Carrie NugentDr Carrie Nugent is an asteroid hunter - one of the select group of scientists working diligently to map our cosmic neighbourhood. For the first time ever we are reaching the point where we may be able to prevent a natural disaster resulting from an asteroid collision. Nugent will delve into the impact asteroids have had in the past: the extinction of the dinosaurs, the earth-sized hole Shoemaker-Levy 9 left in Jupiter just a few years ago, how the surprise hit on Chelyabinsk in Russia could have started a war and unlucky Ms Anne Hodges - the only person (that we know of) in modern history to be the victim of a direct hit. Nugent will also reveal the cutting-edge work that she is part of - using NASA's NEOWISE telescope to track down near-Earth asteroids. NEOWISE has seen over 158,000 asteroids and discovered over 30,000. We will also get a rare glimpse into the work of this band of asteroid hunters and their techniques. Asteroid orbits are chaotic which means a small early change has a big impact later on. The successful hunt and mapping of asteroids could mean nothing less than saving life on Earth.
Asteroid Hunters (TED Books)
by Carrie NugentFor the first time, scientists could have the knowledge to prevent a natural disaster epic in scale—an asteroid hitting the earth and in this exciting, adventuresome book, Carrie Nugent explains how.What are asteroids, and where do they come from? And, most urgently: Are they going to hit the Earth? What would happen if one was on its way? Carrie Nugent is an asteroid hunter—part of a group of scientists working to map our cosmic neighborhood. For the first time ever, we are reaching the point where we may be able to prevent the horrible natural disaster that would result from an asteroid collision. In Asteroid Hunters, Nugent reveals what known impact asteroids have had: the extinction of the dinosaurs, the earth-sized hole Shoemaker Levy 9 left in Jupiter just a few decades ago, how the meteorite that bursted over Chelyabinsk in Russia could have started a war, and unlucky Ms. Anne Hodges—the only person (that we know of) in US history to be the victim of a direct hit. Nugent also introduces the telescope she uses to detect near-Earth asteroids. Ultimately, detection is the key to preventing asteroid impact, and these specialized scientists are working to prevent the unthinkable from happening. If successful, asteroid hunting will lead to the first natural disaster humans have the know-how and the technology to prevent. The successful hunt and mapping of asteroids could mean nothing less than saving life on earth.
The Asteroid Impact Connection of Planetary Evolution
by Andrew Y. GliksonWhen in 1981 Louis and Walter Alvarez, the father and son team, unearthed a tell-tale Iridium-rich sedimentary horizon at the 65 million years-old Cretaceous-Tertiary boundary at Gubbio, Italy, their find heralded a paradigm shift in the study of terrestrial evolution. Since the 1980s the discovery and study of asteroid impact ejecta in the oldest well-preserved terrains of Western Australia and South Africa, by Don Lowe, Gary Byerly, Bruce Simonson, Scott Hassler, the author and others, and the documentation of new exposed and buried impact structures in several continents, have led to a resurgence of the idea of the catastrophism theory of Cuvier, previously largely supplanted by the uniformitarian theory of Hutton and Lyell. Several mass extinction of species events are known to have occurred in temporal proximity to large asteroid impacts, global volcanic eruptions and continental splitting. Likely links are observed between asteroid clusters and the 580 Ma acritarch radiation, end-Devonian extinction, end-Triassic extinction and end-Jurassic extinction. New discoveries of ~3.5 - 3.2 Ga-old impact fallout units in South Africa have led Don Lowe and Gary Byerly to propose a protracted prolongation of the Late Heavy Bombardment (~3.95-3.85 Ga) in the Earth-Moon system. Given the difficulty in identifying asteroid impact ejecta units and buried impact structures, it is likely new discoveries of impact signatures are in store, which would further profoundly alter models of terrestrial evolution. .
Asteroid Impact Risk: Impact Hazard from Asteroids and Comets (Impact Studies)
by Josep M. Trigo-RodríguezThis book describes the complexity of impact hazards associated with asteroids and comets. The challenge in this regard lies in the heterogeneous nature of these bodies that endanger our planet, which is why we are conducting new experiments to better understand their unique physicochemical properties. Several generations of astronomers have tracked and mapped the orbits of asteroids and comets over the past few centuries, and telescopic surveys have only begun to discover “new” interstellar objects. In addition, cutting-edge software allow our computers to combine the orbits of these elusive bodies to study how they evolve over time and seek to match asteroid complexes as fragments of asteroidal and cometary disruptions.Impact hazards represent one of the greatest threats to the survival of human beings in the medium term. Geological studies show that the stratigraphic record holds clear geological evidence of these rare but transcendental encounters in the history of life on our planet. The study and quantification of past catastrophes can give us clues to face future challenges in the form of potential impacts.Further, it would be illogical to assume that Earth’s interaction with space is limited to major impacts. Every night, Earth is struck by millions of particles, and dozens of meteor showers occur around the globe every year. The study of lake and ocean sediments reveals the magnitude of the continuous contribution of interplanetary matter reaching Earth: roughly 100,000 tons per year.Accordingly, the goal of this book is to underscore the need for society-wide awareness of the dangers associated with asteroid and comet impacts, on the basis of scientific evidence and with no intention of sparking alarmism. After all, we ourselves may only be the fruit of an opportunity given to mammals sixty-five million years ago to evolve after the conflagration that would be the downfall of the dinosaurs. If we have learned to read Earth’s geological history, we should consider ourselves a very fortunate species, and its teachings should equip us to face this problem.The also book emphasizes the role of space missions to gain insights on these bodies, particularly describing the relevance of the DART (NASA) and Hera (ESA) missions to deflect and study Dimorphos, respectively, the small satellite of the Didymos binary asteroid.
Asteroid Man
by R L Fanthorpe Lionel Fanthorpe Patricia FanthorpeJonga and Krull had a routine job in the solar system defence organisation. Week after week and year after year they checked the asteroids. 23rd century astronomy had accurately charted 2,812 of those miniature worlds, compared with the 1,539 that are known to-day. Suddenly a new asteroid appears, and a survey expedition under Squadron-leader Gregg Masterson, is sent out to investigate. They expedition fails to return, and when the watching asteroid observation corps make another anxious check, they find that the mysterious planetoid has disappeared as mysteriously as it came. A second expedition is launched under General Rotherson himself. An expedition that finds the wreckage of the survey ships, and the bodies of every man except Gregg Masterson. Where is the missing Squadron leader? Who is the terrible ageless asteroid man? So strong that he can control the destinies of a planet. What is the beautiful Princess Astra of Altain doing in the labyrinth below the surface of the asteroid?
Asteroid, Meteoroid, and Comet Facts (Into Reading, Level T #76)
by Bruce NaylorNIMAC-sourced textbook
Asteroid of Fear
by Raymond Z. GallunAll space was electrified as that harsh challenge rang out ... but John Endlich hesitated. For he saw beyond his own murder--saw the horror and destruction his death would unleash--and knew he dared not fight back!
Asteroid of the Damned
by Dirk WylieSomewhere on that asteroid of sin lurked the crime king of the Universe. Dirk Wylie was the author of ten science fiction and fantasy short stories which appeared in Magazines such as Super Science Stories, Astonishing Stories, and Planet Stories.
The Asteroid Threat
by William E. BurrowsPresents a realistic, workable plan for defusing a potentially lethal threat from a rogue asteroid or comet. The explosion of a large meteor over Chelyabinsk, Siberia, in February 2013 is just the latest reminder that planet Earth is vulnerable to damaging and potentially catastrophic collisions with space debris of various kinds. In this informative and forward-looking book, veteran aerospace writer William E. Burrows explains what we can do in the future to avoid far more serious impacts from "Near-Earth Objects" (NEOs), as they are called in the planetary defense community. The good news is that humanity is now equipped with the advanced technology necessary to devise a long-term strategy to protect the planet. Burrows outlines the following key features of an effective planetary defense strategy: * A powerful space surveillance system capable of spotting a serious threat from space at least twenty-five years in advance* A space craft "nudge" that would throw a collision-course asteroid off target long before it poses the threat of imminent impact * A weapons system to be used as a last-ditch method to blast an NEO should all else fail.The author notes the many benefits for world stability and increasing international cooperation resulting from a united worldwide effort to protect the planet. Combining realism with an optimistic can-do attitude, Burrows shows that humanity is capable of overcoming a potentially calamitous situation.From the Trade Paperback edition.
The Asteroid Wars
by Ben BovaThere is probably no writer of modern science fiction who tells as many plausible stories of our near future as does Ben Bova. These novels center on who will control the economic power of the asteroids and how or if the earth will survive as global warming creates natural disaster after natural disaster.
Asteroids: How Love, Fear, and Greed Will Determine Our Future in Space
by Martin ElvisA unique, wide-ranging examination of asteroid exploration and our future in space Human travel into space is an enormously expensive and unforgiving endeavor. So why go? In this accessible and authoritative book, astrophysicist Martin Elvis argues that the answer is asteroid exploration, for the strong motives of love, fear, and greed. Elvis’s personal motivation is one of scientific love—asteroid investigations may teach us about the composition of the solar system and the origins of life. A more compelling reason may be fear—of a dinosaur killer–sized asteroid hitting our planet. Finally, Elvis maintains, we should consider greed: asteroids likely hold vast riches, such as large platinum deposits, and mining them could provide both a new industry and a funding source for bolder space exploration. Elvis explains how each motive can be satisfied, and how they help one another. From the origins of life, to “space billiards,” and space sports, Elvis looks at how asteroids may be used in the not-so-distant future.