VoIP Signaling Protocols Framework - PowerPoint PPT Presentation

Loading...

PPT – VoIP Signaling Protocols Framework PowerPoint presentation | free to view - id: 1b8c6e-ZDc1Z



Loading


The Adobe Flash plugin is needed to view this content

Get the plugin now

View by Category
About This Presentation
Title:

VoIP Signaling Protocols Framework

Description:

International Telecommunication Union. ITU-T and ITU-D Workshop ... May get relegated to trunking after widespread deployment of SIP ... – PowerPoint PPT presentation

Number of Views:60
Avg rating:3.0/5.0
Slides: 21
Provided by: francine9
Category:

less

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

Title: VoIP Signaling Protocols Framework


1
VoIP Signaling Protocols Framework
  • N. Rajagopal,
  • MindTree Consulting Pvt Ltd

2
Agenda
  • H.323
  • MGCP/MeGaCo
  • SIP
  • Deployment scenarios in India
  • Summary

3
H.323 Family of protocols
  • ITU Recommendation
  • V1 approved in 1996, V2 in 1998
  • Defines multimedia applications over packet based
    networks
  • Originally developed for voice over LANs
  • Widely deployed

4
H.323 Protocol Stack
  • Peer to Peer nature
  • Family of protocols
  • H.225.0 Call signaling
  • H.225.0 RAS
  • H.245 Conference control
  • RTP/RTCP for transport

5
H.323 Components
H.323 MCU
H.323 Gatekeeper
H.323 Terminal
LAN
H.323 Gateway
ISDN
PSTN
6
MGCP
  • Media Gateway Control Protocol
  • Based on master slave architecture
  • Call agent master
  • Media gateways slave
  • Call agent
  • Setups the calls between end points
  • Media gateways
  • Does IP lt-gt voice media conversion

7
MGCP Protocol stack
  • RFC 2705
  • Supports packages for different applications
  • DTMF, Trunking
  • IVR, Media Server
  • Uses RTP/RTCP for transport
  • Designed for TCP/IP network
  • Text based messages

8
MGCP Network architecture
Call Agent
Trunking Gateway
IP Network
Trunking Gateway
IP Network
Media Gateway
Analog Phones
9
MeGaCo
  • Media Gateway Control Protocol
  • Similar to MGCP
  • More complete
  • Flexibility
  • Extensibility
  • Video support
  • Other transport support
  • ATM

10
SIP
  • Session Initiation Protocol (RFC 2543)
  • Management of multimedia sessions
  • Simple, easy protocol
  • 6 messages to get started
  • Uses RTP for media transport
  • Lots of extensions being proposed
  • Standards evolving
  • Possibility of different services
  • Good potential

11
Comparison between Protocols
12
Comparison between protocols (contd)
13
Deployment Scenarios in India
  • H.323
  • LAN Telephony
  • Inter office PSTN toll bypass
  • Remote office connectivity
  • IP Phones

14
Deployment scenarios in India
Office 1
Office 2
IP Phone
Leased lines
IP Network
PC
Office 3
PC
IP Phone
PC
15
Deployment scenarios in India
  • SIP
  • Experimental
  • Promises are high
  • Windows XP support ubiquitous
  • Likely areas of usage
  • Desktops
  • LAN telephony

16
Deployment scenarios in India
  • SIP
  • Services
  • Presence, messaging
  • Integrated services
  • Productivity improvement

17
Deployment scenarios in India
  • SIP
  • Call Centers

PC
Phone
PC with SIP
Call Desk
Call Desk
PC
Phone Cabling
Network Cabling
Network Cabling
18
Deployment scenarios in India
  • MGCP
  • Cable telephony
  • MTU telephony

TV
Set Top Box (Media Gateway)
Headend (CallAgent)
Ethernet
POTS
Home
Cable
PSTN
19
Summary
  • H.323, SIP, MGCP all have their space in VoIP
    space
  • Likely coexistence
  • Softswitch architecture to control the elements
    in VoIP network
  • Services will be key differentiator for
    customer
  • CLECs/new generation service providers likely to
    go for softswitch based solution

20
References
  • http//www.softswitch.org
  • http//www.ietf.org
  • http//www.sipcenter.org
  • http//www.cs.columbia.edu/sip
About PowerShow.com