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VOICE OVER INTRENET PROTOCOL

Deepak Mangal
BCA 6th SEM JNVU
Introduction
VoIP stands for Voice over Internet protocol

“ VoIP is the ability to make telephone calls over
IP-based data networks with a suitable
quality of service and superior cost . ”
Also known as




IP telephony
Voice over Broadband
Internet telephony

VoIP Technology emerged over Public switched Telephone
Network(PSTN).
VoIP History
• The first VoIP software was introduced in 1995 by
Vocaltec.
Designed for home PC
Uses H.323 Protocol
Uses Packet Switching
VoIP Architectures

 PC to PC.
 Phone to Phone Via Internet.
 Phone to internet to PSTN.
 PSTN to Internet to PSTN.
PC to PC

Need a PC with sound card
IP Telephony software(softphone):
Skype, Gtalk, VoIP Stunt....
Video optional
Phone to Phone

Need more gateways that connect IP network to phone
Networks, Internet, The carrier switches
The IP network could be dedicated intra-net or the
PC to Phone

Need a gateway that connects IP network to
phone network
VoIP Protocols
SIP (Session Initiation Protocol): The SIP protocol is a
standard developed by the Internet Engineering Task Force
(IETF) for establishing multimedia sessions such as voice,
instant messaging and video

IAX(Inter Asterisk eXchane): The IAX protocol was
developed by a team of open-source developers working on
the Asterisk project
VoIP Protocols…
H.323: The call setup protocol H.323 is standardized
by the International Telecommunications Union (ITU).
In a VoIP environment, H.323 is a common protocol
running on voice gateways to connect the VoIP network
to the PSTN.

IMS(IP Multimedia Subsystem): IMS is currently in
development and testing phases, and was originally
developed as a protocol for carrying 3G telephony data.
Applications of VoIP
• Real time applications:
Telephony ( two-way)
 Radio-TV Broadcast (one-way)


• Non-real time applications:


•
•
•
•

e-mail

Integration of data, voice and fax
Video telephony
Enhanced teleconferencing
Used in Amateur Radio
Advantage of VoIP
 Integration of Voice and Data
More Bandwidth
Cost Reduction
Video Conferencing
Free IP to IP
Disadvantage of VoIP

Phone line is down if broadband connection is down
Phone router occasionally must be rebooted
Voice quality degrades if internet connection has latency, jitter
of significant packet loss.
THANK YOU

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Voice over IP

  • 1. VOICE OVER INTRENET PROTOCOL Deepak Mangal BCA 6th SEM JNVU
  • 2. Introduction VoIP stands for Voice over Internet protocol “ VoIP is the ability to make telephone calls over IP-based data networks with a suitable quality of service and superior cost . ” Also known as    IP telephony Voice over Broadband Internet telephony VoIP Technology emerged over Public switched Telephone Network(PSTN).
  • 3. VoIP History • The first VoIP software was introduced in 1995 by Vocaltec. Designed for home PC Uses H.323 Protocol Uses Packet Switching
  • 4. VoIP Architectures  PC to PC.  Phone to Phone Via Internet.  Phone to internet to PSTN.  PSTN to Internet to PSTN.
  • 5. PC to PC Need a PC with sound card IP Telephony software(softphone): Skype, Gtalk, VoIP Stunt.... Video optional
  • 6. Phone to Phone Need more gateways that connect IP network to phone Networks, Internet, The carrier switches The IP network could be dedicated intra-net or the
  • 7. PC to Phone Need a gateway that connects IP network to phone network
  • 8.
  • 9. VoIP Protocols SIP (Session Initiation Protocol): The SIP protocol is a standard developed by the Internet Engineering Task Force (IETF) for establishing multimedia sessions such as voice, instant messaging and video IAX(Inter Asterisk eXchane): The IAX protocol was developed by a team of open-source developers working on the Asterisk project
  • 10. VoIP Protocols… H.323: The call setup protocol H.323 is standardized by the International Telecommunications Union (ITU). In a VoIP environment, H.323 is a common protocol running on voice gateways to connect the VoIP network to the PSTN. IMS(IP Multimedia Subsystem): IMS is currently in development and testing phases, and was originally developed as a protocol for carrying 3G telephony data.
  • 11. Applications of VoIP • Real time applications: Telephony ( two-way)  Radio-TV Broadcast (one-way)  • Non-real time applications:  • • • • e-mail Integration of data, voice and fax Video telephony Enhanced teleconferencing Used in Amateur Radio
  • 12. Advantage of VoIP  Integration of Voice and Data More Bandwidth Cost Reduction Video Conferencing Free IP to IP
  • 13. Disadvantage of VoIP Phone line is down if broadband connection is down Phone router occasionally must be rebooted Voice quality degrades if internet connection has latency, jitter of significant packet loss.
  • 14.