金沙娱城乐怎么可以赢钱-官方网站[welcome]

Session Initiation Protocol (SIP) - PowerPoint PPT Presentation

View by Category
About This Presentation
Title:

Session Initiation Protocol (SIP)

Description:

User Agent Server. Proxy Server. Redirect server. Registrar. SIP Message Types ... 'Forking proxy ' SIP has unique user tracking features. SIP addressing ... – PowerPoint PPT presentation

Number of Views:6153
Avg rating:5.0/5.0
Slides: 19
Provided by: aar6
Learn more at: http://impact.asu.edu
Category:

less

Write a Comment
User Comments (0)
Transcript and Presenter's Notes

Title: Session Initiation Protocol (SIP)


1
Session Initiation Protocol(SIP)
  • CSE535

2
Agenda
  • Why do we need SIP ?
  • The protocol
  • Instant Messaging using SIP
  • Internet Telephony with SIP
  • Additional applications
  • Future Directions

3
Introduction
  • SIP is the core protocol for initiating, managing
    and terminating sessions in the Internet
  • These sessions may be text, voice, video or a
    combination of these
  • SIP sessions involve one or more participants and
    can use unicast or multicast communication.

4
SIP entities
  • User Agent
  • User Agent Client
  • User Agent Server
  • Proxy Server
  • Redirect server
  • Registrar

5
SIP Message Types
  • Requests sent from client to server
  • INVITE
  • ACK
  • BYE
  • CANCEL
  • OPTIONS
  • REGISTER
  • INFO

6
SIP Message Types (Contd.)
  • Responses sent from server to the client
  • Success
  • Redirection
  • Forwarding
  • Request failure
  • Server failure
  • Global failure

7
Courtesy The RADVISION SIP Whitepaper
8
SIP Session Establishment and Call Termination

From the
RADVISION whitepaper on SIP
9
SIP Call Redirection
From the RADVISION
whitepaper on SIP
10
Call Proxying

From the
RADVISION whitepaper on SIP
11
Instant messaging based on SIP
  • SIMPLE IM protocol based on SIP
  • SIP promises interoperability between various IM
    vendors
  • Forking proxy
  • SIP has unique user tracking features.
  • SIP addressing

12
Instant Messaging (Contd.)
SIP Redirect server
columbia.edu
SIP proxy
2
5
Location service
3
6
foo.com
dynamic.com
4
10
11
7
proxy
1
12
8
9
13
SIP Client
SIP Client
sales.foo.com
13
SIP for Internet Telephony
  • Two types of phones IP phones and conventional
    analog phones.
  • Uses phone numbers instead of IP addresses
  • To place a call to an IP phone, DNS is used
  • To place a call to an analog phone, gateway
  • protocols like BGP are used

14
SIP Protocol Use

Henning Schulzrinnes
tutorial on SIP
15
Additional SIP applications
  • PINT (PSTN and Internetworking) protocol
  • Internet call waiting

16
What is the future of SIP
  • SIP is still a proposed standard
  • Competing protocol H.323
  • IM vendors have not adopted SIP

17
References
  • Computer Telephony June 2000
  • http//www.radvision.com
  • www.cs.columbia.edu/hgs/
  • www.networkcomputing.com
  • www.wikipedia.com

18
  • Thank you
About PowerShow.com
金沙娱城乐怎么可以赢钱