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Implementing Voice over IP 1st Edition
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"…short and to the point, and still offers quite a comprehensive presentation of VoIP and the technologies related to it." (IEEE Network, September 2004)
From the Back Cover
A hands-on guide to the theoretical and practical aspects of todays voice communications technology
The standards and technologies for transmitting voice via the Internet protocol (IP) are areas of major commercial importance in modern telecommunications. Until recently, the majority of traffic over communications networks was made up of circuit-switched voice calls. Today, the amount of voice traffic is dwarfed by the huge volume of packet-switched data (including text and audio files, streaming video, etc.) that is overtaking the medium. Consequently, public and private networks must be configured to route all voice calls using IP-based protocols.
Aimed at industry professionals such as network architects and IT practitioners as well as graduate students of electrical and computer engineering, Implementing Voice over IP provides a detailed explanation of the design and architectures for Voice over IP while covering important implementation features.
Written by a leading industry professional, Implementing Voice over IP . . .
- reviews existing and emerging standards for Voice over IP
- provides detailed guidance on how to engineer an efficient Voice over IP network
- discusses quality of service enforcement techniques
- illustrates how to prototype and test a networks performance
. . . and ultimately provides readers with all the information necessary to build a packet-switched network that can support high-quality voice communication.
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We see a substantial contrast between the monolithically designed PSTN and the common choice of an open architecture for various VoIP implementations.
Measuring the quality of a VoIP channel is also covered. Methods like buffering can be used to (partially) compensate for delay jitter. Unlike standard email or web usage of the Internet, the real time requirements of a voice interaction leads to significantly more complicated methods that sit atop TCP/IP. The book does not appear to mention IPv6. That has an explicit Quality of Service, to address such real time issues. Granted, v6 is still not heavily deployed. But it may simplify VoIP.