Digital TelephonyFrom the reviews of the Second Edition . "The book stresses how systems operate and the rationale behind their design, rather than presenting rigorous analytical formulations . [It provides] the practicality and breadth essential to mastering the concepts of modern communications systems." -Telecommunication Journal In this expanded new edition of his bestselling book, telephony expert John Bellamy continues to provide telecommunications engineers with practical, comprehensive coverage of all aspects of digital telephone systems, while addressing the rapid changes the field has seen in recent years. Bellamy discusses the near-complete conversion to digital technology in telephone networks worldwide, examines both existing and emerging technologies, and explores the intricacies of carrying voice over data networks as well as the use of telephone networks for carrying data for Internet access. He emphasizes system design, implementation, and application, but also correlates the practice to communications theory. With 30 percent new material, Digital Telephony, Third Edition features: * Clear explanations on how to overcome problems associated with the replacement of old analog technology with new digital technology * A new chapter on digital mobile telephone technology * New material on how, data networks support voice communication * A new chapter on digital subscriber access technologies * More than 300 graphs illustrating concepts * Examples from the U.S. network as well as ITU public telephone networks |
Contents
Background and Terminology | 1 |
Why Digital? | 73 |
Voice Digitization | 91 |
Copyright | |
18 other sections not shown
Common terms and phrases
A-law ADSL algorithm amplitude analog applications arrivals Assume average bandwidth baseband basic bit rate blocking probability buffers bytes carrier cell channel banks Chapter circuit-switched clock coder codeword common-channel signaling Communications companding connection crosspoints D-AMPS data rate decoder delay detection detector determined digital loop carrier digital signal digital transmission elastic store encoding Equation equipment erlangs error rate example fiber filter frame frequency function IEEE implementation input interface intersymbol interference ISDN jitter kbps line code linear code loop lost calls maximum modulation multiple multiplexing node noise power occur operation optical output packet packet-switching pair partial-response path performance phase pulse quantization intervals queue radio receiver referred routing segment servers shown in Figure slot SONET specific spectrum speech subscriber switching system synchronization T-carrier techniques telephone network traffic intensity transmission link transmission systems transmitted trunk group virtual circuit voice voiceband waveform