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8/13/2019 Murat Mert
http://slidepdf.com/reader/full/murat-mert 1/24
| PSTN ISDN TDM |
Presention By:♠ Murat Irkkan
♠ Mert Kaptan
8/13/2019 Murat Mert
http://slidepdf.com/reader/full/murat-mert 2/24
PSTN
What is PSTN (Public Switched Network)?
How Data is transferred over PSTN?
How to connect net over PSTN?
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Circuit - Switching
1. Real Time Voice Transmission
2. Point To Point Networks3. Bandwidth is constant
4. Data Transmission
PSTN & ISDN & TDM
Circuit – Switching Network
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Constant Bandwidth
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What is PSTN?
Circuit - Switching telephone network
Carries analog voice
Constant Bandwith
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Data Transfer Over PSTN
Digital lines between santrals
E1 Tranks: 32 channels X 64Kbps
3 X E1 Trank
Santral 1 Santral 2
UsersUsers
Digital
Analog Analog
32X3=96 calls
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How to connect net over PSTN?
Modem converts;
Digital data to Analog voice
28 Kbps
56 Kbps
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How to connect net over PSTN?
Santral
DigitalAnalog
Analog
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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 & settingsare needed for the ISDN?
What is BroadBand ISDN?
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What is ISDN?
Integrated Services Digital Network
Allow digital transmission
Support wide range of services over achannel
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Services that ISDN supports
Voice Calls
Fax Transmission
Data Transmission & Voice
Linking to the internet
Video Conferencing
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How Does ISDN Works?
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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
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Network Devices & Settings For ISDN
Digital Line
Network Terminator Max:8terminal
ISDN Modem (Terminals)
Same as Standart Modem Configuration
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What Is BroadBand ISDN?
Max 2MBits/Sec to 1GigaBits/Sec
Related With ATM
(Asynchronous Transfer Mode)
Fiber Optics Using
Atm Cell;
5Bytes 48 Bytes
Head Data
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ATM != ATM
(Asynchronous Transfer Mode)
ATM !=
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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.
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TDM
What is TDM (Time Division Multiplexing)?
Theory of Time Division Multiplexing
Differences between TDM and ATM
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Time Division Multiplexing
Continuous,compact and orderly
data transfer
Voice and image data transfer at thesame time
Constant bandwidth
Secure connection
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Theory of Time Division Multiplexing
Channel A
Channel B
Channel C
Sequential
Channel A
Channel B
Channel C
Time Channels
A|B|C|A|B|C
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TDM vs ATM
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References
www.teach-ict.com/as_a2/topics/telephone_systems/telephone_systems/
30 MAY 2006
http://en.wikipedia.org/
30 MAY 2006
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◄ The End ►
Presented By;
♠ Murat Irkkan♠ Mert Kaptan
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Any Questions?
” Are Wellcomed ”