CNDSCNDSISDN PresentationISDN Presentation

Group Members:

1. Kok Wai Hien KL003828

2. Oon Thiam TeckKL003833

3. Lim Cheah Yiing KL003687

4. Woon Yen Lin KL003856

5. Tan Pei Voon KL003889

6. Monica Choy KL003857

7. Leong Pui Yee KL003603

Lecturer: Miss Ponnu Devi

ObjectiveObjective

To integrate the service network in WAN.To integrate the service network in WAN.

Discuss Discuss Future Application and ServicesFuture Application and Services that that will benefits from broadband.will benefits from broadband.

Discuss Discuss ChannelsChannels of ISDN. of ISDN.

IntroductionIntroduction

What is ISDN? What is ISDN? Stands for Stands for IIntegrated ntegrated SServices ervices DDigital igital NNetworketwork

Is a system of Is a system of digital phone connectionsdigital phone connections..

Allows data to be transmitted simultaneously Allows data to be transmitted simultaneously across the world -- across the world -- end-to-end digitalend-to-end digital connectivity.connectivity.

The combining of The combining of voice and data servicesvoice and data services over over the same wires.the same wires.

Provides a huge improvement in access Provides a huge improvement in access speedspeed. .

It's equally available to It's equally available to home and businesshome and business customers.customers.

Supports both Supports both circuit switchingcircuit switching and and packet packet switchingswitching..

HistoryHistory Conventional phone system use analogueConventional phone system use analogue

Great inefficiencyGreat inefficiency Prone to breakdown and noiseProne to breakdown and noise Did not lend itself well to long-distance Did not lend itself well to long-distance

connectionsconnections

In the 1960’s, the telephone system began In the 1960’s, the telephone system began converting its internal connections to a packet-converting its internal connections to a packet-based, digital switching system.based, digital switching system.

Today, most voice switching in the world is Today, most voice switching in the world is digital.digital.

Recently, ISDN service has been displaced by Recently, ISDN service has been displaced by broadband internet servicebroadband internet service..

These services are :These services are : fasterfaster less expensiveless expensive and easier to set up and maintain than ISDN. and easier to set up and maintain than ISDN.

Benefits of ISDN :Benefits of ISDN :

To the To the useruser cost savings and flexibility.cost savings and flexibility. single access line to all services.single access line to all services.

To To network providersnetwork providers support larger potential market for services.support larger potential market for services. drive down equipment costs.drive down equipment costs.

To To manufacturersmanufacturers larger potential market, economies of larger potential market, economies of

scales.scales. standards decrease risk of obsolescence.standards decrease risk of obsolescence.

To To enhanced service providersenhanced service providers simplified user access.simplified user access.

Conceptual ViewConceptual View

ISDN Architecture:ISDN Architecture:

All modern switches are able to switch ISDN calls, using All modern switches are able to switch ISDN calls, using ISDN lineISDN line cardscards and and ISDN featureISDN feature softwaresoftware. .

Digital signal takes place between the Digital signal takes place between the customer's terminalcustomer's terminal and and the the central officecentral office..

Terminal Equipment (TE)Terminal Equipment (TE) -- connected computers, fax -- connected computers, fax machines, LANs, or telephone sets. machines, LANs, or telephone sets.

TE1 – connect directly through 4 wired twisted pair digital linkTE1 – connect directly through 4 wired twisted pair digital link TE2 – connect through TATE2 – connect through TA

Terminal Adapter (TA)Terminal Adapter (TA) -- either a stand-alone device or a -- either a stand-alone device or a board inside TE2 board inside TE2

Network Termination 1 (NT1)Network Termination 1 (NT1) – physical and electrical – physical and electrical terminationtermination

Network Termination 2 (NT2)Network Termination 2 (NT2) – intelligent devices for – intelligent devices for switching and concentrationswitching and concentration

Circuit-switched capabilities : 64-kbpsCircuit-switched capabilities : 64-kbps Packet-switching capabilities : as provided by Packet-switching capabilities : as provided by

other data networks.other data networks. Frame-mode capabilities : supporting frame Frame-mode capabilities : supporting frame

relayrelay Common-channel signaling capabilities : used Common-channel signaling capabilities : used

to control the network and provide call to control the network and provide call management.management.

Narrowband ISDNNarrowband ISDN Broadband ISDNBroadband ISDN

2 Generations of ISDN2 Generations of ISDN

Bearer-channel (B-channel)Bearer-channel (B-channel) : :

Carry user "Carry user "conversationsconversations" from a " from a telephone, a computer, a fax.telephone, a computer, a fax.

Carries voice and data at Carries voice and data at 64 Kbps64 Kbps.. Supports Supports circuit-switched, packet-switched, circuit-switched, packet-switched,

frame mode frame mode and and semi permanent semi permanent connectionsconnections..

Delta-channel (D-channel)Delta-channel (D-channel) : :

Carries signaling information to Carries signaling information to control control circuit switchedcircuit switched calls on B-channel. calls on B-channel.

Can be used for a data transmission Can be used for a data transmission communication at a lower data rate.communication at a lower data rate.

16Kbps / 64Kbps16Kbps / 64Kbps Carry Carry low-speedlow-speed data applications. data applications.

(e.g., videotex, telemetry)(e.g., videotex, telemetry)

High-speed channel (H-channel)High-speed channel (H-channel) : :

Can be used as a Can be used as a single trunksingle trunk or or subdividedsubdivided by the user.by the user.

Fast fax, video, high-speed data, high-Fast fax, video, high-speed data, high-quality audio and multiplexed information quality audio and multiplexed information streams at lower data rates.streams at lower data rates.

384Kbps(H0), 1536Kbps(H11), 1920 384Kbps(H0), 1536Kbps(H11), 1920 Kbps(H12)Kbps(H12)

There are 2 types of ISDN interfaces:There are 2 types of ISDN interfaces:

Basic Rate Interface (BRI)Basic Rate Interface (BRI) – intended for – intended for home use.home use.

Primary Rate Interface (PRI)Primary Rate Interface (PRI) – intended – intended for business.for business.

Basic Rate Interface (BRI) :Basic Rate Interface (BRI) :

Consists of Consists of two B-channelstwo B-channels for data at 64 Kbps for data at 64 Kbps and and one D-channelone D-channel for control and signaling at for control and signaling at 16 Kbps (2B + D).16 Kbps (2B + D).

2 x 64 Kbps + 16 Kbps = 144 Kbps (not 2 x 64 Kbps + 16 Kbps = 144 Kbps (not including overhead), total 192 Kbps (including including overhead), total 192 Kbps (including 48 Kbps overhead).48 Kbps overhead).

Designed to operate using the average local Designed to operate using the average local copper paircopper pair

Basic Rate Interface (BRI) : cont’Basic Rate Interface (BRI) : cont’BRI can carry a BRI can carry a wide and flexible rangewide and flexible range of of communications. communications. A single BRI, for example, can carry two A single BRI, for example, can carry two simultaneous voice or data conversationssimultaneous voice or data conversations

Primary Rate Interface (PRI)Primary Rate Interface (PRI) ::

Consists of Consists of one 64 Kbps D-channelone 64 Kbps D-channel for for signaling and signaling and 23 B-channels23 B-channels (23B + D). (23B + D).

23 x 64 Kbps + 64 Kbps = 1.536 Mbps (not 23 x 64 Kbps + 64 Kbps = 1.536 Mbps (not including overhead)including overhead)

In EuropeIn Europe - 2.048 Mbps - either 30 or 31 - 2.048 Mbps - either 30 or 31 64Kbps B-channels, or one 64Kbps D-channel - 64Kbps B-channels, or one 64Kbps D-channel - thus 30B+D or 31B+D. thus 30B+D or 31B+D.

Primary Rate Interface (PRI)Primary Rate Interface (PRI) :: cont’cont’

In United States and JapanIn United States and Japan, consists of 23 64 , consists of 23 64 Kbps B-channels and one 64 Kbps D-channel, Kbps B-channels and one 64 Kbps D-channel, or 23B+D with a total bandwidth of 1.544Mbps.or 23B+D with a total bandwidth of 1.544Mbps.

PRI for larger users.

Layered ISDN ProtocolLayered ISDN Protocol

ConclusionConclusion

3 types of channels : B, D, and H channels3 types of channels : B, D, and H channels

2 types of ISDN interfaces : BRI and PRI2 types of ISDN interfaces : BRI and PRI

Benefits of ISDNBenefits of ISDN

3 layers of protocol in ISDN 3 layers of protocol in ISDN

Q & AQ & A 1)What are the three types of 1)What are the three types of

channels in ISDN? channels in ISDN?

Bearer-channel (B-channel)Bearer-channel (B-channel) Delta-channel (D-channel) Delta-channel (D-channel) High-speed channel (H-channel)High-speed channel (H-channel)

2) What are the two types of ISDN 2) What are the two types of ISDN interfaces?interfaces?

Basic Rate Interface (BRI) Basic Rate Interface (BRI) Primary Rate Interface (PRI)Primary Rate Interface (PRI)

3) 3) What is B-channel? What is B-channel? carries circuit switched voice and/or data carries circuit switched voice and/or data

communications at speeds up to 64 kbps.communications at speeds up to 64 kbps. Bearer channel -- bBearer channel -- basic user channel.asic user channel.

4) 4) What are the 3 layers of What are the 3 layers of

protocol in ISDN? protocol in ISDN?

Layer 1 - Physical LayerLayer 1 - Physical Layer Layer 2 - Data Link LayerLayer 2 - Data Link Layer Layer 3 - Network LayerLayer 3 - Network Layer

5) 5) What are the 2 generations of What are the 2 generations of ISDN? ISDN?

Narrowband ISDNNarrowband ISDN Broadband ISDNBroadband ISDN

6)Who will get the benefits of ISDN?6)Who will get the benefits of ISDN?

useruser network providersnetwork providers manufacturersmanufacturers enhanced service providersenhanced service providers

ReferenceReference

http://www.y-net.gr/hpcn/english/isdnhttp://www.y-net.gr/hpcn/english/isdn// http://http://www.ralphb.netwww.ralphb.net/ISDN//ISDN/ http://www.idstech.com/overview.htmhttp://www.idstech.com/overview.htm http://vvv.it.kth.se/edu/gru/Telesys/95P2_Telesyhttp://vvv.it.kth.se/edu/gru/Telesys/95P2_Telesy

stem/HTML/Module10/ISDN+ATM-4.htmlstem/HTML/Module10/ISDN+ATM-4.html http://www.webopedia.com/http://www.webopedia.com/ http://http://www.wikipedia.comwww.wikipedia.com//

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