Introduction to SIP-Session Initiation Protocol - Multi-Media Tutorial

July 16, 2007
What is SIP?
SIP-Session Initiation Protocol is a real-time communication protocol for VOIP-Voice over IP. SIP is a signaling protocol for internet conferencing, telephony, presence, events notification (emergency calling) and instant messaging. SIP has also been expanded to support video and instant-messaging applications. 
SIP is a telephony signaling protocol that is used to establish a "communications session or connection" such as a telephone call, IM-Instant Message, conference call or other type of communications on an IP-Internet Protocol network. SIP is a request-response protocol that operates like a "communications browser" protocol such as HTTP-Hypertext Transfer Protocol.   SIP is the communications equivalent to such internet protocols such as HTTP and SMTP-Simple Mail Transfer Protocol. 
 
As shown here, SIP uses a text-based programming language designed to perform basic call-control tasks, such as session call set up and tear down as well as signaling for features such as call hold, caller ID, conferencing and call transferring. 
 
As shown here, the function of signaling is to connect, monitor, alter and disconnect communications sessions. If you prefer, establish, change and terminate sessions. SIP does not address message content.   SIP also uses a series of signaling commands to provide common responses.
 
This audio-video tutorial is available in number of media formats such as Adobe-Flash (.swf), .mp3 (audio only), and Apple QuickTime (.mov). You can download any or all of the files here: (right-click and save as):
http://www.techtionary.com/audio/sip
If you have problems opening the .swf, right-click and open with Flash Player (Flash8). The iPod format .mv4 is available by request - see email to cross@gocross.com for the video iPod while the .mp3 files are audio-only and can be heard on any mp3 player.
This is also part of a complete SIP training program available from TMCnet:
http://www.tmcnet.com/tmcnet/mkt/nacse/sip-essentials.htm
 

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