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| PSTN ISDN TDM |

Presention By:♠ Murat Irkkan

♠ Mert Kaptan

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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 ”