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Once a guest on telephone lines, the Net now threatens a takeover of its host's principal function: voice-to-voice communications. For intrabusiness use or as a public system, Internet-based telephony can be a real money-saver - or money-maker. In Voice Over IP Networks, you'll learn everything you need to: transmit real-time voices over the Internet; understand the technology and its costs; compare leading vendors and their Internet telephony products - 3Com, Motorola, Lucent, VocalTec, Vienna Systems, Nuera Communications, and more; evaluate advantages of the IPv6 and IPv4 protocols; use RSVP, RTSP, IP Multicast, SONET, ATM, and other technologies for telephony; apply Codecs to voice digitization; emulate T1/E1 trunks; implement a system with appropriate standards; and anticipate trends and new products from innovative companies such as QWest.
Sorting out the competing and sometimes conflicting claims made about the different technologies available to implement Voice over IP (VoIP) telephone solutions is difficult, even for professionals in the field. In Voice over IP Networks, Marcus Goncalves provides an in-depth look at the technologies available and solutions provided by a wide range of suppliers.
The first chapter covers Internet Protocol version 6 (IPv6), and is followed by chapters that explain Resource Reservation Setup Protocol (RSVP), IP Multicasting, and Asynchronous Transfer Mode (ATM). Broadband packets are covered in chapter 6. The second part of the book covers codecs and evaluates offerings from a large number of suppliers in the VoIP industry. The CD-ROM that comes with the book contains product information from ABL, Telogy, and Nuera, including many white papers on VoIP technology.
This book will help anyone planning to implement telephone service using VoIP determine which technologies to use. Its clear style and intelligent use of graphics makes the material much more accessible than it would otherwise be. A good general understanding of telephony technology is recommended for readers of this book. --Robert Frankland
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