Exploring the Future Potential of AI-Enabled Smartphone Processors
Internet telephony
1. A
PRESENTATION
ON
INTERNET TELEPHONY
GUIDEED BY R.K.DALAI
PRESENTED BY
LALITA
BEHURA
Reg. No-0305247037
Roll No-41
2. “It's probably the most significant
shift in the entire history of modern
communications, since the invention
of the telephone.”
3. IINNTTRROODDUUCCTTIIOONN
Internet telephony is a powerful and economical
communication option by combination of the
telephone network and data networks.
Internet telephony uses internet to send audio
between two or more computer users in the real
time,so the the user can converse vocal Tec
introduced the first internet telephony software
product in early 1995
4. THE FACTORS WHICH IS MAKING
INTERNET TELEPHONY POSSIBLE
voice quality is increasing thanks to new
codec technology.
There are on going improvements in
compression techniques.
Full-duplex PC sound cards enable two way
simultaneous calls.
The typical PC is getting more & more
powerful,making it possible processor-intensive
functions without specialized
hardware.
5. GENERATION OF INTERNET
TELEPHONY
The first generation :-Introduction to enable voice
conversations user with telephony software-equipped-
computers.
The second generation:-it overcomes the
difficulties with PSTN interfaces protocols and
mapping IP address.
The third generation:-internet telephony starts to
receive serious attention.these gateways provides a
two-ways interfaces between the PSTN and
internet.
6. IINNTTEERRNNEETT PPRROOTTOOCCOOLLSS
IP packets are forwarded across the network by routers
IP Routers do best-effort routing
Voice signals can be prioritized using priority queues
RTP and RTCP keep end points informed of
transmission quality.
Call set up is done using Session Initiation Protocol
(SIP) or something similar
7. VOICE OVER INTERNET
TELEPHONE
VoIP tries to let go voice (mainly human)
through IP packets.
VoIP works like that, digitalizing voice in
data packets.
Voice (source) - - ADC - - - - Internet - - -
DAC - - Voice (dest)
8. PPuubblliicc sswwiittcchheedd tteelleepphhoonnee
nneettwwoorrkk ((PPSSTTNN))
A synonym for traditional circuit-switched
telephone networks offered by public
telecommunication operators (PTOs), as
well as integrated services digital networks
(ISDN), and public land mobile networks
(PLMN).
9. PPSSTTNN vvss.. IInntteerrnneett TTeelleepphhoonnyy
Signaling & Media Signaling & Media
Signaling Signaling
Media
PSTN:
Internet
telephony:
China
Belgian customer,
currently visiting US
Australia
10. WWHHAATT AANN IIDDEEAALL IINNTTEERRNNEETT
TTEELLEEPPHHOONNYY
High volume call processing within and
between public and private networks.
High volume real-time translation between
IP and switched networks.
Economic scalability.
Broad acceptance and implementations of
standards.
13. FFuullllyy MMeesshheedd TTDDMM NNeettwwoorrkk
HH..332233
Tokyo
Sydney
London
New York
Frankfurt
Los Angeles
Amsterdam
Based on actual and world composites figures from Band-X, 4/01
14. MGC MGC
SIP
Server
ISUP ISUP
TGW TGW
PSTN PSTN
IP Network
SIP-T
SIP-T
SIP-T
MGC – Media Gateway Controller
TGW – Trunking Gateway
PSTN – Public Switched Telephone
Network
MEGACO/H.248
Signaling
SSIIPP--TT User Data
15. MGC – Media Gateway Controller
MG – Media Gateway
PSTN – Public Switched Telephone Network
MGC MGC
IP backbone
MG MG
MEGACO
MEGACO/H.248
Signaling
MMEEGGAACCOO User Data
Private
Network
Private
Network
SIP, H.323,
RTP, AAL 1/2/5
16. INTERNET TTEELLEEPPHHOONNYY HHAARRDDWWAARREE
RREEQQUUIIRREEMMEENNTT
PC 386 or more & Sound card.
Full duplex capable .
A network card connected with internet.
Hardware accelerating cards .
Quicknet PhoneJack
Quicknet LineJack
VoiceTronix V4PCI
VoiceTronix VPB4
VoiceTronix VPB8L
17. AADDVVAANNTTAAGGEESS::
In VoIP mechanism you can talk all the time
with every person you want (the needed is
that other person is also connected to
Internet at the same time), as far as you want
(money independent) and, in addition, you
can talk with many people at the same time.
Exchange audio data with people and also
simultaneously sending images, graphs and
videos.
18. DDIISSAADDVVAANNTTAAGGEE
Integration between VoIP architecture and
Internet.
voice data communication must be a real
time stream (you couldn't speak, wait for
many seconds, then hear other side
answering): this is in contrast with the Internet
Heterogeneous architecture that can be made
of many routers (machines that route
packets),which has a very high round trip time
(RTT), so we need to modify something to get
it properly working.
19. WHAT THE USER GET NOW
Point to multipoint voice.
Data conferencing.
Application sharing.
Long distance telephone saving.
20. IIMMPPAACCTT OONN TTHHEE IITT MMAARRKKEETT
Will IP Telephony be able to cut cost?
Ans:-It depends on the organistions ability
to reduce the costs associated with infotech
personnel,network equipment and the
transmission services.
21. IINNDDIIAANN DDIIAASSPPOORRAA
In Indian context we need to cut the costs
for the people to be enabled to connected to
the world and change the living styles.
22. SSUUMMMMAARRYY
Business acceleration in this century is
directly related to the success of IT
organization's ability of giving a
competitive edge
“Convergence of all communication traffic
onto a packet network “
With a few exceptions, in Internet telephony, end systems are the only entities where signaling and media flows converge. Thus, any service that requires interaction with user media is likely to be easier to implement in the end systems.
More seperately
Sip provide services Initiation,modification,termination
Media gateway control protocol is a protocol controlling telephony gateway from external call.MG provide user interaction & interface,MGC pov. Centralized call intelligence.