| PSTN ISDN TDM || PSTN ISDN TDM |

Presention By:

♠ Murat Irkkan

♠ Mert Kaptan

PSTNPSTN

What is PSTN (Public Switched Network)?How Data is transferred over PSTN?How to connect net over PSTN?

Circuit - SwitchingCircuit - Switching

1. Real Time Voice Transmission

2. Point To Point Networks

3. Bandwidth is constant

4. Data Transmission

PSTN & ISDN & TDM

Circuit – Switching Network

Constant BandwidthConstant Bandwidth

What is PSTN?What is PSTN?

Circuit - Switching telephone network

Carries analog voice

Constant Bandwith

Data Transfer Over PSTNData Transfer Over PSTN

Digital lines between santralsE1 Tranks: 32 channels X 64Kbps

3 X E1 Trank

Santral 1 Santral 2

UsersUsers

Digital

Analog Analog

32X3=96 calls

How to connect net over PSTN?How to connect net over PSTN?

Modem converts;

Digital data to Analog voice28 Kbps56 Kbps

How to connect net over PSTN?How to connect net over PSTN?

SantralDigitalAnalog

Analog

ISDNISDN

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?What is ISDN?

Integrated Services Digital Network

Allow digital transmission

Support wide range of services over a channel

Services that ISDN supportsServices that ISDN supports

Voice CallsFax TransmissionData Transmission & VoiceLinking to the internetVideo Conferencing

How Does ISDN Works?How Does ISDN Works?

Types of ISDNTypes 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 ISDNNetwork Devices & Settings For ISDN

Digital LineNetwork Terminator Max:8terminal

ISDN Modem (Terminals)

Same as Standart Modem Configuration

What Is BroadBand ISDN?What Is BroadBand ISDN?

Max 2MBits/Sec to 1GigaBits/SecRelated With ATM

(Asynchronous Transfer Mode)Fiber Optics UsingAtm Cell;

5Bytes 48 BytesHead Data

ATM != ATMATM != ATM (Asynchronous Transfer Mode) (Asynchronous Transfer Mode)

ATM !=ATM !=

Advantages of ISDNAdvantages of ISDN

Digital Service ~ Less Errors.Connection is fast.Higher bandwidth.Voice, data and video can all be sent over

a single ISDN line.

TDMTDM

What is TDM (Time Division Multiplexing)?Theory of Time Division MultiplexingDifferences between TDM and ATM

Time Division MultiplexingTime Division Multiplexing

Continuous,compact and orderly data transfer

Voice and image data transfer at the same time

Constant bandwidthSecure connection

Theory of Time Division MultiplexingTheory of Time Division Multiplexing

Channel A

Channel B

Channel C

SequentialChannel A

Channel B

Channel C

Time Channels

A|B|C|A|B|C

TDM vs ATMTDM vs ATM

ReferencesReferences

www.teach-ict.com/as_a2/topics/telephone_systems/telephone_systems/

30 MAY 2006 http://en.wikipedia.org/

30 MAY 2006

◄ ◄ The End ►The End ►Presented By;

♠ Murat Irkkan

♠ Mert Kaptan

Any Questions?Any Questions?

” Are Wellcomed ”