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Session Initiation Protocol (SIP) was conceived in 1996 as a
signaling protocol for inviting users to multimedia conferences.
With this development, the next big Internet revolution silently
started. That was the revolution which would end up converting the
Internet into a total communication system which would allow people
to talk to each other, see each other, work collaboratively or send
messages in real time. Internet telephony and, in general, Internet
multimedia, is the new revolution today and SIP is the key protocol
which allows this revolution to grow.
The book explains, in tutorial fashion, the underlying technologies
that enable real-time IP multimedia communication services in the
Internet (voice, video, presence, instant messaging, online picture
sharing, white-boarding, etc). Focus is on session initiation
protocol (SIP) but also covers session description protocol (SDP),
Real-time transport protocol (RTP), and message session relay
protocol (MSRP). In addition, it will also touch on other
application-related protocols and refer to the latest research work
in IETF and 3GPP about these topics. (3GPP stands for
"third-generation partnership project" which is a collaboration
agreement between ETSI (Europe), ARIB/TTC (Japan), CCSA (China),
ATIS (North America) and TTA (South Korea).) The book includes
discussion of leading edge theory (which is key to really
understanding the technology) accompanied by Java examples that
illustrate the theoretical concepts.
Throughout the book, in addition to the code snippets, the reader
is guided to build a simple but functional IP soft-phone therefore
demonstrating the theory with practical examples.
This book covers IP multimedia from both a theoretical and
practical point of view focusing on letting the reader understand
the concepts and put them into practice using Java. It includes
lots of drawings, protocol diagrams, UML sequence diagrams and code
snippets that allow the reader to rapidly understand the concepts.
KEY FEATURES
* Focus on HOW multimedia communications over the Internet works to
allow readers to really understand and implement the technology
* Explains how SIP works, including many programming examples so
the reader can understand abstract concepts like SIP dialogs, SIP
transactions, etc.
* It is not focused on just VoIP. It looks At a wide array of
enhanced communication services related to SIP enabling the reader
put this technology into practice.
* Includes nearly 100 references to the latest standards and
working group activities in the IETF, bringing the reader
completely up to date.
* Provides a step-by-step tutorial on how to build a basic, though
functional, IP soft-phone allowing the reader to put concepts into
practice.
* For advanced readers, the book also explains how to build a SIP
proxy and a SIP registrar to enhance one's expertise and
marketability in this fast moving area.
La alta incidencia de alteraciones en el acido
desoxicirribonucleico por agentes xenotoxicos como algunos farmacos
de administracion prolongada, hace necesario realizar pruebas
especiales de genotoxicidad, para asegurar la ingesta de
medicamentos de uso cronico en enfermedades cronicas degenerativas,
como son los farmacos inmunomoduladores como el interferon-beta,
factor de transferencia y glicina propuestos en enfermedades
degenerativas del sistema nervioso central y periferico, entre las
que comentamos en este libro: esclerosis multiple, esclerosis
lateral amiotrofica, sind. Guillain-Barre, paralisis facial,
enfermedades que a su vez producen discapacidad. A personas con
estas enfermedades se les atienden en el Instituto Nacional de
Rehabilitacion para su rehabilitacion integral, y asi disminuir su
discapacidad y mejorar su calidad de vida."
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