| PSTN ISDN TDM |
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Transcript | PSTN ISDN TDM |
| PSTN ISDN TDM |
Presention By:
♠ Murat Irkkan
♠ Mert Kaptan
PSTN
What is PSTN (Public Switched Network)?
How Data is transferred over PSTN?
How to connect net over PSTN?
Circuit - Switching
1.
2.
3.
4.
Real Time Voice Transmission
Point To Point Networks
Bandwidth is constant
Data Transmission
PSTN & ISDN & TDM
Circuit – Switching Network
Constant Bandwidth
What is PSTN?
Circuit - Switching telephone network
Carries analog voice
Constant Bandwith
Data Transfer Over PSTN
Digital lines between santrals
E1 Tranks: 32 channels X 64Kbps
Analog
3 X E1 Trank
Analog
Users
Users
Santral 1
Digital
32X3=96 calls
Santral 2
How to connect net over PSTN?
Modem converts;
Digital data to Analog voice
28 Kbps
56 Kbps
How to connect net over PSTN?
Analog
Santral
Analog
Digital
ISDN
What is ISDN
(Integrated Services Digital Network)?
How it works?
Types of ISDN?
What can be done by using ISDN?
What type of network devices & settings
are needed for the ISDN?
What is BroadBand ISDN?
What is ISDN?
Integrated Services Digital Network
Allow digital transmission
Support wide range of services over a
channel
Services that ISDN supports
Voice Calls
Fax Transmission
Data Transmission & Voice
Linking to the internet
Video Conferencing
How Does ISDN Works?
Types of ISDN
ISDN BA / BRI
Basic Access / Basic Rate Interface
Formula:2B+1D
For KOBI’s & Home Users
ISDN PA / PRI
Primary Access / Primary Rate Interface
Formula:30B+1D
For Internet Service Providers & Big Companies
Network Devices & Settings For ISDN
Digital Line
Network Terminator Max:8terminal
ISDN Modem (Terminals)
Same as Standart Modem Configuration
What Is BroadBand ISDN?
Max 2MBits/Sec to 1GigaBits/Sec
Related With ATM
(Asynchronous Transfer Mode)
Fiber Optics Using
Atm Cell;
Head
5Bytes
Data
48 Bytes
ATM != ATM
(Asynchronous Transfer Mode)
ATM !=
Advantages of ISDN
Digital Service ~ Less Errors.
Connection is fast.
Higher bandwidth.
Voice, data and video can all be sent over
a single ISDN line.
TDM
What is TDM (Time Division Multiplexing)?
Theory of Time Division Multiplexing
Differences between TDM and ATM
Time Division Multiplexing
Continuous,compact and orderly
data transfer
Voice and image data transfer at the
same time
Constant bandwidth
Secure connection
Theory of Time Division Multiplexing
Channel A
Channel A
Sequential
Channel B
Channel B
Channel C
A|B|C|A|B|C
Time Channels
Channel C
TDM vs ATM
References
www.teach-ict.com/as_a2/topics/telephone_systems/telephone_systems/
30 MAY 2006
http://en.wikipedia.org/
30 MAY 2006
◄ The End ►
Presented By;
♠ Murat Irkkan
♠ Mert Kaptan
Any Questions?
” Are Wellcomed ”