The Session Initiation Protocol (SIP) is a signaling In the public switched telephone network, , in-band signalling is the exchange of signalling (call control) information within the same channel that the telephone call itself is using. An example is DTMF 'Dual-Tone multi-frequency' signalling, which is used on most telephone lines to exchanges protocol, widely used for controlling multimedia Multimedia is media and content that uses a combination of different content forms. The term can be used as a noun or as an adjective describing a medium as having multiple content forms. The term is used in contrast to media which only use traditional forms of printed or hand-produced material. Multimedia includes a combination of text, audio, communication sessions In computer science, in particular networking, a session is a semi-permanent interactive information interchange, also known as a dialogue, a conversation or a meeting, between two or more communicating devices, or between a computer and user . A session is set up or established at a certain point in time, and torn down at a later point in time such as voice Voice over Internet Protocol is a general term for a family of transmission technologies for delivery of voice communications over IP networks such as the Internet or other packet-switched networks. Other terms frequently encountered and synonymous with VoIP are IP telephony, Internet telephony, voice over broadband (VoBB), broadband telephony, and video calls over Internet Protocol (IP). The protocol can be used for creating, modifying and terminating two-party (unicast In computer networking, unicast transmission is the sending of messages to a single network destination host on a packet switching network) or multiparty (multicast Multicast addressing is a network technology for the delivery of information to a group of destinations simultaneously using the most efficient strategy to deliver the messages over each link of the network only once, creating copies only when the links to the multiple destinations split) sessions consisting of one or several media streams. The modification can involve changing addresses or ports, inviting more participants, adding or deleting media streams A stream is a flowing body of water with a current, confined within a bed and stream banks. Depending on its locale or certain characteristics, a stream may be referred to as a branch, brook, beck, burn, creek, kill, lick, rill, river syke, bayou, rivulet, or run. In some countries or communities a stream may be defined by its size. In the United, etc. Other feasible application examples include video conferencing A videoconference or video conference is a set of interactive telecommunication technologies which allow two or more locations to interact via two-way video and audio transmissions simultaneously. It has also been called 'visual collaboration' and is a type of groupware, streaming multimedia However, computer networks were still limited, and media was usually delivered over non-streaming channels, such as by downloading a digital file from a remote web server and then saving it to a local drive on the end user's computer or storing it as a digital file and playing it back from CD-ROMs distribution, instant messaging Instant messaging is a form of real-time direct text-based communication between two or more people using shared clients. The text is conveyed via devices connected over a network such as the Internet, presence information In computer and telecommunications networks, presence information is a status indicator that conveys ability and willingness of a potential communication partner--for example a user--to communicate. A user's client provides presence information via a network connection to a presence service, which is stored in what constitutes his personal and online games An online game is a game played over some forms of computer network. This almost always means the Internet or equivalent technology; but games have always used whatever technology was current: modems before the Internet, and hard wired terminals before modems. The expansion of online gaming has reflected the overall expansion of computer networks.
SIP was originally designed by Henning Schulzrinne and Mark Handley Mark Handley is Professor of Networked Systems in the Department of Computer Science of University College London since 2003, where he leads the Networks Research Group. He holds a Royal Society Wolfson Research Merit Award as well as a Roger Needham Award starting in 1996. The latest version of the specification is RFC 3261[1] from the IETF The Internet Engineering Task Force develops and promotes Internet standards, cooperating closely with the W3C and ISO/IEC standards bodies and dealing in particular with standards of the TCP/IP and Internet protocol suite. It is an open standards organization, with no formal membership or membership requirements. All participants and managers are Network Working Group.[2] In November 2000, SIP was accepted as a 3GPP The 3rd Generation Partnership Project is a collaboration between groups of telecommunications associations, to make a globally applicable third generation (3G) mobile phone system specification within the scope of the International Mobile Telecommunications-2000 project of the International Telecommunication Union (ITU). 3GPP specifications are signaling protocol and permanent element of the IP Multimedia Subsystem The IP Multimedia Subsystem is an architectural framework for delivering Internet Protocol (IP) multimedia services. It was originally designed by the wireless standards body 3rd Generation Partnership Project (3GPP), as a part of the vision for evolving mobile networks beyond GSM. Its original formulation (3GPP R5) represented an approach to (IMS) architecture for IP-based streaming multimedia services in cellular systems.
The SIP protocol is a TCP/IP The Internet Protocol Suite is the set of communications protocols used for the Internet and other similar networks. It is named from two of the most important protocols in it: the Transmission Control Protocol (TCP) and the Internet Protocol (IP), which were the first two networking protocols defined in this standard. Today's IP networking-based Application Layer Application Layer is a term used in categorizing protocols and methods in architectural models of computer networking. Both the OSI model and the Internet Protocol Suite contain an application layer protocol. SIP is designed to be independent of the underlying transport layer; it can run on Transmission Control Protocol The Transmission Control Protocol is one of the core protocols of the Internet Protocol Suite. TCP is one of the two original components of the suite (the other being Internet Protocol, or IP), so the entire suite is commonly referred to as TCP/IP. Whereas IP handles lower-level transmissions from computer to computer as a message makes its way (TCP), User Datagram Protocol The User Datagram Protocol is one of the core members of the Internet Protocol Suite, the set of network protocols used for the Internet. With UDP, computer applications can send messages, in this case referred to as datagrams, to other hosts on an Internet Protocol (IP) network without requiring prior communications to set up special transmission (UDP), or Stream Control Transmission Protocol In computer networking, the Stream Control Transmission Protocol is a Transport Layer protocol, serving in a similar role as the popular protocols Transmission Control Protocol (TCP) and User Datagram Protocol (UDP). Indeed, it provides some of the same service features of both, ensuring reliable, in-sequence transport of messages with congestion (SCTP).[3] It is a text-based protocol, incorporating many elements of the Hypertext Transfer Protocol Hypertext Transfer Protocol is an application-level protocol for distributed, collaborative, hypermedia information systems. Its use for retrieving inter-linked resources, called hypertext documents, led to the establishment of the World Wide Web in 1990 by English physicist Tim Berners-Lee. There are two major versions, HTTP/1.0 that uses a (HTTP) and the Simple Mail Transfer Protocol Simple Mail Transfer Protocol is an Internet standard for electronic mail (e-mail) transmission across Internet Protocol (IP) networks. SMTP was first defined in RFC 821 (STD 15), and last updated by RFC 5321 (2008) which includes the extended SMTP (ESMTP) additions, and is the protocol in widespread use today. SMTP is specified for outgoing mail (SMTP),[4] allowing for direct inspection by administrators.
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VoIP services portfolio from XO Communications include XO IP Flex, XO IP Flex with VPN and XO SIP . According to officials, the service has been deployed by ...
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Overview VoIP SDK to accelerate development of any type of VoIP enabled application like a SIP soft phone teaching tool live support meeting tool or any other type of application which
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hu, 17 Dec 2009 17:36:00 GM
In February 1999, the . Session Initiation Protocol. (. SIP. was created) by mmusic to life. The platform showed some advantages over H.323 that user appreciated and soon made it almost as popular. 1999 was a very busy year, followed quickly ...
Q. a. root b. gateway c. mcdonalds d. proxy e. cisco
Asked by lamar211us - Tue Jun 12 15:40:54 2007 - - 1 Answers - 0 Comments
A. b gateway. A root server is used in DNS, macdonalds? dont think so. D proxy: servers used to allow access to hosts going out to the internet. E Cisco: the only cisco servers I know are used for VOIP management. B gateway: a gateway is any device that can connect different types of connections or allow access to the outside world. In this case, audio conferences can go from a regular LAN out to regular phone lines, a gateway will be right in the middle to handle and tear down the connection on a session based protocol. hope it help good luck on your final
Answered by marco - Tue Jun 12 18:50:22 2007
