Packet Guide to Voice Over IP

Packet Guide to Voice Over IP
Author: Bruce Hartpence
Publisher: "O'Reilly Media, Inc."
Total Pages: 243
Release: 2013
Genre: Computers
ISBN: 1449339670

"A system administrator's guide to VoIP technologies"--Cover.

Voice and Data Communications Handbook

Voice and Data Communications Handbook
Author: Regis J. Bates
Publisher: McGraw Hill Professional
Total Pages: 1112
Release: 2001
Genre: Computers
ISBN: 9780072131888

Straightforward and jargon-free, this updated edition is highly useful for anyone wanting to understand the latest advances in telecommunications and the rapidly evolving field of voice and data communications."--Jacket.

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.

Voice, Video, and Data Network Convergence

Voice, Video, and Data Network Convergence
Author: Juanita Ellis
Publisher: Elsevier
Total Pages: 353
Release: 2003-09-11
Genre: Technology & Engineering
ISBN: 0080474810

Covers the latest standards and those being developed in an ever-evolving field Provides insight into the latest technology of video and data over wireless networks and how convergence will be a driving force in this industry Provides an understanding of the true capabilities behind each vendor's solution to allow for informed buying decisions A recent survey of 500 U.S. companies with multiple locations found that 81% are planning to implement IP Telephony on their local area networks (LANs) in 2003, and two-thirds are looking at convergence for their wide area networks (WANs) as well. This includes voice, video and data over hard line and wireless networks. Today, new standards and technologies are being developed to support convergence and voice over IP (VoIP) and Video over IP and wireless. Because convergence covers the voice and data world, it will be critical to understand all of these environments. Voice, Video, and Data Network Convergence provides detailed information on convergence network models, protocol stacks, routing algorithms, gateways and switches required to support these networks. Covers the latest standards and those being developed in an ever-evolving field Provides insight into the latest technology of video and data over wireless networks and how convergence will be a driving force in this industry Provides an understanding of the true capabilities behind each vendor's solution to allow for informed buying decisions

Voice and Data Security

Voice and Data Security
Author: Gregory B. White
Publisher: Sams Publishing
Total Pages: 508
Release: 2001
Genre: Computers
ISBN: 9780672321504

"Data and Voice Security" will enable readers to protect data networks from the most common threats. Learn what security vulnerabilities currently exist in data networks, and become aware of the threats the telephone network poses to the data network. Use updated information to protect the data network from the telephone network

Switching to VoIP

Switching to VoIP
Author: Theodore Wallingford
Publisher: "O'Reilly Media, Inc."
Total Pages: 504
Release: 2005
Genre: Computers
ISBN: 0596517297

More and more businesses today have their receive phone service through Internet instead of local phone company lines. Many businesses are also using their internal local and wide-area network infrastructure to replace legacy enterprise telephone networks. This migration to a single network carrying voice and data is called convergence, and it's revolutionizing the world of telecommunications by slashing costs and empowering users. The technology of families driving this convergence is called VoIP, or Voice over IP. VoIP has advanced Internet-based telephony to a viable solution, piquing the interest of companies small and large. The primary reason for migrating to VoIP is cost, as it equalizes the costs of long distance calls, local calls, and e-mails to fractions of a penny per use. But the real enterprise turn-on is how VoIP empowersbusinesses to mold and customize telecom and datacom solutions using a single, cohesive networking platform. These business drivers are so compelling that legacy telephony is going the way of the dinosaur, yielding to Voice over IP as the dominant enterprise communications paradigm. Developed from real-world experience by a senior developer, O'Reilly's Switching to VoIP provides solutions for the most common VoIP migration challenges. So if you're a network professional who is migrating from a traditional telephony system to a modern, feature-rich network, this book is a must-have. You'lldiscover the strengths and weaknesses of circuit-switched and packet-switched networks, how VoIP systems impact network infrastructure, as well as solutions for common challenges involved with IP voice migrations. Among the challenges discussed and projects presented: building a softPBX configuring IP phones ensuring quality of service scalability standards-compliance topological considerations coordinating a complete system ?switchover? migrating applications like voicemail and directoryservices retro-interfacing to traditional telephony supporting mobile users security and survivability dealing with the challenges of NAT To help you grasp the core principles at work, Switching to VoIP uses a combination of strategy and hands-on how-to that introduce VoIP routers and media gateways, various makes of IP telephone equipment, legacy analog phones, IPTables and Linux firewalls, and the Asterisk open source PBX software by Digium.You'll learn how to build an IP-based or legacy-compatible phone system and voicemail system complete with e-mail integration while becoming familiar with VoIP protocols and devices. Switching to VoIP remains vendor-neutral and advocates standards, not brands. Some of the standards explored include: SIP H.323, SCCP, and IAX Voice codecs 802.3af Type of Service, IP precedence, DiffServ, and RSVP 802.1a/b/g WLAN If VoIP has your attention, like so many others, then Switching to VoIP will help you build your own system, install it, and begin making calls. It's the only thing left between you and a modern telecom network.

Integrating Voice and Data Networks

Integrating Voice and Data Networks
Author: Scott Keagy
Publisher: Cisco Press
Total Pages: 817
Release: 2000
Genre: Computer networks
ISBN: 1578701961

Annotation Voice/Data Integration on Cisco Networks is both a conceptual reference and a practical how-to book that bridges the gap between existing telephony networks and the new world of packetized voice over data networks. Technologies are explained in a context that gives the reader a holistic understanding of voice/data integration. Reader can then follow a complete process to design and implement a variety of network scenarios, leveraging the author's experience with real voice/data networks. The audio accompaniment on CD-ROM will be an excellent companion to demonstrate the expected voice quality using different voice/data networking scenarios. This will allow professionals in the field to demonstrate different sound quality levels to customers.

VoIP Voice and Fax Signal Processing

VoIP Voice and Fax Signal Processing
Author: Sivannarayana Nagireddi
Publisher: John Wiley & Sons
Total Pages: 592
Release: 2008-10-03
Genre: Technology & Engineering
ISBN: 0470377860

A complete and systematic treatment of signal processing for VoIP voice and fax This book presents a consolidated view and basic approach to signal processing for VoIP voice and fax solutions. It provides readers with complete coverage of the topic, from how things work in voice and fax modules, to signal processing aspects, implementation, and testing. Beginning with an overview of VoIP infrastructure, interfaces, and signals, the book systematically covers: Voice compression Packet loss concealment techniques DTMF detection, generation, and rejection Wideband voice modules operation VoIP Voice-Network bit rate calculations VoIP voice testing Fax over IP and modem over IP Country deviations of PSTN mapped to VoIP VoIP on different processors and architectures Generic VAD-CNG for waveform codecs Echo cancellation Caller ID features in VoIP Packetization—RTP, RTCP, and jitter buffer Clock sources for VoIP applications Fax operation on PSTN, modulations, and fax messages Fax over IP payload formats and bit rate calculations Voice packets jitter with large data packets VoIP voice quality Over 100 questions and answers on voice and more than seventy questions and answers on fax are provided at the back of the book to reinforce the topics covered throughout the text. Additionally, several clarification, interpretation, and discussion sections are included in selected chapters to aide in readers' comprehension. VoIP Voice and Fax Signal Processing is an indispensable resource for professional electrical engineers, voice and fax solution developers, product and deployment support teams, quality assurance and test engineers, and computer engineers. It also serves as a valuable textbook for graduate-level students in electrical engineering and computer engineering courses.