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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