isdn presenttaion

7/30/2019 ISDN Presenttaion

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Group Members

Usama Shabbir

Syed Ali Akbar ShahHammad Shah

Izhar Ali


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USAMA SHABBIR

Integrated ServicesDigital Network

(ISDN)


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Presentation ObjectivesDefine ISDN, its standards and the

type of services offered.

ISDNs Block DiagramTypes of ISDN Channels

Types of ISDN Connections

Advantages


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What Is ISDN????ISDNis a method of transmission. Itis asystem of digital phone connections whichhas been available for over a couple of

decades. This system allows voice and datato be transmitted simultaneously across theworld using end-to-end digital connectivity.It is designed to carry voice, data, images,

video etc. isdn standardized by ITU.


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Integrated Services DigitalNetwork


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Types of Channel B Channel (Bearer), it carry data by

employing circuit-switching

technique. D Channel (Data), it carry control

signals by employing packet-switching

technique.

Channel Data

Rates

(Kbps)

Bearer (B) 64

Data (D) 16, 64


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Types of ISDN Connections

BRI(Basic Rate Interface), for home

uses.PRI(Primary Rate Interface), for

large office uses.


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ISDN Devices

Terminal Equipment Type 1 (TE1) - Compatible with theISDN network. Example: Personal computers, fax

machine or videoconferencing machine. Terminal Equipment Type 2 (TE2) - Not compatible with

the ISDN network. Example: Analog telephone ormodem, requires a TA (TE2 connects to TA).

Terminal Adapter (TA) - Converter device that

converts standard electrical signals into the form usedby ISDN, it allows non-ISDN devices to operate on anISDN network(sometimes called "ISDN Modems").

Network Termination type 1 & 2 (NT1 and NT2) - Asmall connection box that physically connects the

customer site to the Telecom local loop, provides afour-wire connection to the customer site and a two-wire connection to the

network .


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ISDN Devices


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ISDN Reference Points


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ISDN and the OSI Reference

Model

The ISDN Physical Layer

The ISDN Data Link Layer

The ISDN Network Layer


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ISDN Advantages Carries a variety of user traffic, such as digital video,

data, and telephone network services, using the normalphone circuit-switched network

It provides better quality of voice data than an analogphone because it is a circuit switchedtelephone network system.

ISDN takes only 2 seconds to launch a connection while

other modems take 30 to 60 second for establishment. Provides a faster data transfer rate than Dial- Up

modems by using the 64-kbps bearer channel (Bchannel).

Can combine multiple B channels to bandwidth of 128

kbps. Support of voice and non-voice applications in

the same network.


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Summary ISDN is a switched digital network ISDN Can be used for establishing a point-to-point digital

connection.

In both BRI and PRI number of B Channels vary in eachcase.

B channels can be combined together to achieve a highercommunication speed.


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ISDN

"It Still Does Nothing"


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At the end Ill thankful to you for your

attention.

Now Ill try to answer the questionsyou may have?


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ALLAHHAFIZ

isdn presenttaion

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