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The second edition contains updated and expanded chapters and many new illustrations. It places increased emphasis on digital technology and provides a new chapter on services.
Provides information on Asterisk, an open source telephony application.
"Introduction to Telephones and Telephone Systems" provides a non-technical, easy-to-understand explanation of every major aspect of today's telecommunications systems perfect for telephone system managers, telecommunications sales professionals, and students. The book gives readers a comprehensive coverage of the four major areas of telephone systems--station apparatus, transmission, switching, signaling--plus fiber optics, PCS systems, regulatory issues and more.
Asterisk is a powerful and flexible open source framework for building feature-rich telephony systems. As a Private Branch Exchange (PBX) which connects one or more telephones, and usually connects to one or more telephone lines, Asterisk offers very advanced features, including station-to-station calls, line trunking, call distribution, call detail rerecords, and call recording.
This book explains the different types of mobile telephone technologies and systems from 1st generation analog to 3rd generation digital broadband. It describes the basics of how they operate, the different types of wireless voice, data and information services, key commercial systems, and typical revenues/costs of these services. While new competition has provided lower cost services for consumers, it means a rapidly changing marketplace for the wireless industry. Some of these changes include the increase in mobile telephone customers from 300 million to 1.3 billion customers within 5 years and the shift of focus from adding new voice customers to providing advanced services such as data transfer, web browsing, and software downloads. The types of services that mobile telephone systems can offer vary depending on the technologies, devices, and the services selected by customers. This book discusses the different types of systems including 1st, 2nd, 2.5, and third generation wireless (3G). Some of the most important topics featured are: - Simple descriptions and diagrams of analog and digital mobile telephone systems- The key types of wireless services and which types of mobile telephone systems can offer them- The approximate usage fees for mobile telephone services- The market numbers and trends for mobile subscribers- How each mobile telephone system continues to change to offer new services and better compete against other mobile telephone technologies.- What are the key applications driving the mobile telephone market growth.- What are the next steps in mobile telephone systems such as 4G
Here's an easy-to-comprehend book that gives you a complete introduction to communication technologies and systems, offering you a solid understanding of the fundamentals, history and future direction of this ever-changing field. Geared towards non-technical business professionals and students, this unique resource integrates human physiology and factors, important inventors and business people, and basic technological principles to explain the key concepts and developments of modern communications.
The first comprehensive history of the Information Age... how we got there and where we are going The exchange of information is essential for both the organization of nature and the social life of mankind. Until recently, communication between people was more or less limited by geographic proximity. Today, thanks to ongoing innovations in telecommunications, we live in an Information Age where distance has ceased to be an obstacle to the sharing of ideas. The Worldwide History of Telecommunications is the first comprehensive history ever written on the subject, covering every aspect of telecommunications from a global perspective. In clear, easy-to-understand language, the author presents telecommunications as a uniquely human achievement, dependent on the contributions of many ingenious inventors, discoverers, physicists, and engineers over a period spanning more than two centuries. From the crude signaling methods employed in antiquity all the way to today’s digital era, The Worldwide History of Telecommunications features complete and fascinating coverage of the groundbreaking innovations that have served to make telecommunications the largest industry on earth, including: Optical telegraphy Electrical telegraphy via wires and cables Telephony and telephone switching Radio transmission technologies Cryptography Coaxial and optical fiber networks Telex and telefax Multimedia applications Broad in scope, yet clear and logical in its presentation, this groundbreaking book will serve as an invaluable resource for anyone involved or merely curious about the ever evolving field of telecommunications. AAP-PSP 2003 Award Winner for excellence in the discipline of the "History of Science"
Comprehensive introduction to cell phone culture and theory.