Download Internet Communications Using SIP: Delivering VoIP and by Henry Sinnreich PDF

By Henry Sinnreich

''This booklet is sort of a stable journey guide.It does not simply describe the most important sights; you percentage within the heritage, spirit, language, and tradition of the place.''
--Henning Schulzrinne, Professor, Columbia University

Since its beginning in 1996, consultation Initiation Protocol (SIP) has grown up. As a richer, even more powerful know-how, SIP at the present time is totally able to aiding the verbal exchange structures that strength our twenty-first century paintings and life.

This moment variation instruction manual has been remodeled to hide the latest criteria, providers, and items. you will discover the most recent on SIP utilization past VoIP, together with Presence, quick messaging (IM), mobility, and emergency companies, in addition to peer-to-peer SIP purposes, quality-of-service, and protection issues--everything you want to construct and install brand new SIP services.

This e-book can assist you
* paintings with SIP in Presence and event-based communications
* deal with SIP-based application-level mobility issues
* increase functions to facilitate communications entry for clients with disabilities
* manage Internet-based emergency services
* discover how peer-to-peer SIP structures could swap VoIP
* comprehend the severe significance of web transparency
* establish suitable criteria and specifications
* deal with power quality-of-service and safeguard difficulties

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Additional info for Internet Communications Using SIP: Delivering VoIP and Multimedia Services with Session Initiation Protocol

Example text

Internet telephony and the wider family of Internet communications are defined by several key application level protocols. 1. 1 Key Standard Internet Multimedia Protocols FUNCTION OF THE PROTOCOL STANDARD [2] DESCRIPTION Real Time Transfer (RTP) RFC 3550 End-to-end real-time transport for audio, video, and data, without quality of service (QoS). Audio/Video Profiles RTP/ AVP RFC 3551 Defines protocol fields for audio and video and lists some basic standard encodings. 1 (continued) FUNCTION OF THE PROTOCOL STANDARD [2] DESCRIPTION Session Description (SDP) RFC 2327 The description required for initiating multimedia sessions.

Summary This chapter has discussed some of the problems and solutions to the communications industry by the Internet, and also a brief history of the SIP protocol. During the migration from circuit-switched telephony to IP-based communications, there are too many isolated wired and wireless communication networks, even though most (but not all) are converging on SIP. SIP has undergone a 10-year development as a standard and in implementations in the marketplace. By adopting the Internet as The Network with wired and wireless access, and SIP as the standard protocol, rich global communications are taking shape.

Past Obsessions and Present Dangers: QoS and Security Network-based quality of service (QoS) for voice and the reliability of the legacy telephone network have long been used by telephone industry marketers to scare users away from VoIP. In the meantime, all public VoIP services have proven that Internet best-effort QoS works just fine, as long network congestion is avoided. 1 kHz voice over the PSTN. As for reliability, all recent major man-made and natural disasters have proven the Internet and VoIP to be more resilient than the existing wireline and wireless telephone networks.

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