Voice Over IP Fundamentals
J. Davidson

This book is a complete revision of the best-selling, well-respected first edition (1578701686). The continued focus of Voice over IP Fundamentals is to bring users, implementers, and developers of this technology up to a basic level of understanding of the marketplace, history, and future of VoIP. This is accomplished through thorough updates to technical data and examination of new applications that have become popular over the past years. Areas for future growth are also explored. This new edition focuses on the many changes that have occurred in basic technology and new applications using that technology. For example, the first version of this book published when SIP was a new and unknown technology. SIP is now seen as the ideal control protocol for voice traffic and other real time media streams. Additionally, new applications combining legacy services with new services are being deployed. One example of these services is the combination of telephony services and presence applications. As there are multiple titles in the marketplace that address how to specifically implement a given technology, this book focuses primarily on the technology and applications. This second edition features brand-new chapters on billing and mediation services, voice security, IP and PSTN internetworking, and applications chapters for both enterprises and service providers.A systematic approach to understanding the basics of voice over IP Understand the basics of enterprise and public telephony networking, IP networking, and how voice is transported over IP networks Learn the various caveats of converging voice and data networks Examine the basic VoIP signaling protocols (H.323, MGCP/H.248, SIP) and primary legacy voice signaling protocols (ISDN, C7/SS7) Explore how VoIP can run the same applications as the existing telephony system but in a more cost-efficient and scalable manner Delve into such VoIP topics as jitter, latency, packet loss, codecs, QoS tools, and security  Voice over IP (VoIP) has become an important factor in network communications, promising lower operational costs, greater flexibility, and a variety of enhanced applications. To help you understand VoIP networks, Voice over IP Fundamentals provides a thorough introduction to the basics of VoIP. Voice over IP Fundamentals explains how a basic IP telephony infrastructure is built and works today, major concepts concerning voice and data networking, and transmission of voice over data networks. You'll learn how voice is signaled through legacy telephone networks, how IP signaling protocols are used to interoperate with current telephony systems, and how to ensure good voice quality using quality of service (QoS). Even though Voice over IP Fundamentals is written for anyone seeking to understand how to use IP to transport voice, its target audience comprises both voice and data networking professionals. In the past, professionals working in voice and data networking did not have to understand each other's roles. However, in this world of time-division multiplexing (TDM) and IP convergence, it is important to understand how these technologies work together. Voice over IP Fundamentals explains all the details so that voice experts can understand data networking and data experts can understand voice networking. The second edition of this best-selling book includes new chapters on the importance of billing and mediation in a VoIP network, security, and the common types of threats inherent when packet voice environments, public switched telephone networks (PSTN), and VoIP interoperate. It also explains enterprise and service-provider applications and services. 

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Wydawnictwo: inne
Data wydania: b.d
Kategoria: Informatyczne
ISBN: 978-1-58705-257-6
Liczba stron: 0