1

NISDN (Narrow Band ISDN)

• ISDN = Integrated Services Digital Network

• Sentral Digital, Transmisi Digital, akses masih analog

• NISDN: Digitalisasi akses menjadi 64 kbps

2

Broadband services Broadband services didefinisikan sebagai “layanan telekomunikasi yang membutuhkan kanal transmisi lebih besar dari 2 Mbps (E1)”Atau: Jaringan digital yang dapat melayani apa saja: jasa data kecepatan tinggi, videophone, videoconference, transmisi grafis resolusi tinggi, CATV, termasuk juga jasa sebelumnya seperti telepon, data, telemetri dan faksimile

Narrowband ServicesNarrowband services didefinisikan sebagai layanan telekomunikasi yang membutuhkan kanal transmisi yang relatif senpit bandwidthnya atau lebih kecil dar 2 MB/s.

Bandwidth Bandwidth didefinisikan sebagai kemampuan kanal yang dapat melalukan data dengan kecepatan tertentu.Dalam sirkit dijital besarannya diukur dalam Bit Per Second (Bp/s) yang biasa disebut denga kecepatan transmisi. Untuk sistem analog diukur dengan Hertz (Cycle per second)

3

Bandwidth for different services

10 KB/s 100 KB/s 1 MB/s 10 MB/s 100 MB/s

Voice

Video

Data

Telephony

Braodcast

Videoconference

TV and HDTV

Video

Inter-LAN / PBX communication

FAX

CAD Graphic

4

Practical Limit on 24-Gauge TW Pair

Designation Bandwidth Limit (one way)

Distance Limitation

DS 1/TI

E1

DS 2

E2

¼ STS-1

½ STS-1

STS-1

1.544 MBps

2.048 MBps

6.312 MBps

8.448 MBps

12.960 MBps

25.920 MBps

51.840 MBps

18.000 feet

16.000 feet

12.000 feet

9.000 feet

4.500 feet

3.000 feet

1.000 feet

5

Integrated Services Digital Network (ISDN)

NT ISDNIU

NT ISDNIU

144 Kbit/s2B + D

Twisted Copper Pair Access Network

144 Kbit/s2B + D

Twisted Copper Pair Access Network

C P E

C P E

2 Mb/s 64 Kb/s

Digital Switch64 Kb/s

Digital Switch64 Kb/s

ISDN TLP

ISDN TLP

6

ISDN digunakan karena pada switching digital umumnya terjadi pergerakan signal 64 Kb/s dari satu lintasan signal 2Mb/s ke lintasan lain, selain dari pada itu content yang terdapat pada 64 Kb/s dapat berupa speech, data atau video.

Dengan sistem ISDN memungkinkan Customer melalui kabel tembaga mengirim berbagai signal pada jaringan switching telephone pada rate 64 Kb/s. Jadi dengan cara itu ISDN dapat memberikan pertukaran informasi dari Customer Premises yang satu kepada Customer Premises lainnya dengan sistem switching

64 Kb/s.

7

Terdapat 2 jenis access layanan ISDN 1. Basic Rate Interface (BRI) atau Basic Rate

Access (BRA) dikenal dengan 2B+D Sistem ini terdiri dari 2 bearer 64 Kb/s untuk

transmisi informasi dan 1 kanal signaling 16 Kb/s, digunakan unutk hubungan yang sederhana.

2. Primary Rate Interface (PRI) atau Primary Rate Access (PRA) dikenal dengan 30B+D yaitu terdiri dari 30 bearer channels pada rate 64 Kb/s dan 1 signalling cahnnel 16 Kb/s, umumnya digunakan untuk sistem yang lebih kompleks misalnya beberapa PABX dan hubungan komputer dengan kapasitas besar.

8

LE

NT

ISDN TLP

NT

( 2B + D )

PABX

( 30B + D )

Primary Rate Access30B + D

Basic RateAccess

ISDN TLP

9

Telecommunication Service

Basic TeleService

Barrier Service TeleService

Basic BarrierService

Basic TeleService +

Supplementary Services

Basic Barrier Service +SupplementaryServices

10

NT PBX

PSTN

N-ISDN

PSPDN

30B+D2B+D

BRA PRA

Basic ISDN Concepts

TA

FAX

Passivebus

11

NT2 NT1 LT ET

TA

IN Reference model and Interface

TE 1ISDN

TERMINAL

TE 2NON-ISDN TERMINAL

S T U V

R

Non ISDN Standard

Basic Rate 192 KBpsPrimary Rate 2048 Kbps

12

TerminologyET Exchange Terminal

TE 1 Terminal type 1, digital or ISDN terminal

TE 2 Terminal type 2, non ISDN terminal

NT 1 Network Terminal type 1, connect ISDN Subscriber with netwrok

NT 2 Network Terminal type , connect non-ISDN Subscriber with netwrok via TA

TA Terminal Adaptor, connect ISDN with non-ISDN subcriber

R Interface non ISDN termina with network

S Interface between NT 2 and ISDN terminal

T Interface between NT 2 and NT 1

U InterfaceInterface between NT 1 and LT

V Interface between LT and ET

13

Three types ISDN standard bearer services :

• 3.1 KHz audio, used in modemtrafficand in intercommunication with non-ISDN services.

• 64 Kbpsunrestricted, providing a transparant 64 Kbps connection (no echo suppresor & bit manipulation).

• Speech, 64 Kbps voice connection, tranparancy is not guarranted.

The examples of teleservice :

• Telephony 3.1 KHz and Telephony 7 KHz• Telefax group2/3 and telefax group 4• Video Text• Video telephony

14

ISDN Basic Service

Circuit Switch Modes

• 64 Kbps, unrestricted

• 64Kbps, for speech

• 64 Kbps, for audio3,1 Khz

• Alternative speech / 64 Kbps, unrestricted

• 2 X 64 Kbps, unrestricted

• 384 Kbps, unrestricted

• 1536 Kbps, unrestricted

• 1920 Kbps, unrestricted

For circuit switched data

For conversi to analog

For transfer of data during a speech call

Packet Switched Mode

• Virtual and permanent - virtual circuit

• Connectionless

• User signalling

15

ISDN Teleservice

• Telephony

• Teletext

• Telefax 4 (Fax Group 4)

• Mixed mode doc transfer

• Videotext

• Telex

16

ISDN Supplementary Services

Number Identification :

• Direct Dialling

• Multiple subcriber number

• Calling Line Identificatin Presentation (CLIP)

• Calling Line Identificatin Retriction

• Connected line Identification Presentation

• Connected line Identification Restriction

• Malicious call Idebtification

• Sub Adressing

Call Offering

• Call transfer

• Call forwarding Busy

• Call forwarding No Reply

• Call forwarding unconditional

• Call Deflectyion

• Line Hunting

17

ISDN Supplementary Services (Cntonued)

Call Completion• Call waiting

• Call Hold (allow call tobe interrupted and re-established)

• Call completion to busy subcribers

Multi Party :• Conference Calling

• Three party Service

Community Interest :• Closed User Group (terbatas hanya untuk anggota grup, dengan

fasilitas tambahan)

• Private Numbering Plan

Charging :• Credit Card Calling

• Advice of Charge

• Reverse Cahrging

Additional information transfer :• User to user Signalling

18

Switcging and switch Control

PSTN and ISDN are ussualy combinedto form dual in which theu usethe same resources. Since both digitised are 64 Kbps circuit switching, the two netwqork can share subscriber switches as well as group switch equipment.

ISDN

local

Transit

PSTN

local

Transit

SS-7

STP

Common Functions :processors, group switches,etc

Application

Platform

Figure of Outline PSTN and ISDN exchange

19

Group Switch

ETC

Accessserver

Signalling Equipment

Switching Part

Control systems

O & M

Charging Supllementary Services

Switch Control

Signalling

Subscribers Data

(1)

(2)

(3)

(4)

(5)(7)

(6)

(8)

(9)

(10)

To other networkor exchange

To localInternet router

Subscriberstage

Local Exchange in PSTN/ISDN

20

Legend :

(1). The access circuit(2). Digital line board for connection of digital access(3). The analysis of signalling(4). The switch control will be much more complex,(5). Others supplementary services(6). Charging function is more complicated.(7). Subscribers data for different types of terminal.(8). Capable for interworking witch other ISDN Exchange(9). Some are equiped with X.25 traffic or B or D channels.(10). Access for internet

21

INTELLIGENT NETWORK

An Intelligent Network consist of a number of basic elements, the switching and transmission facility to carry the call traffic. The additional part of IN are :

1. Additional processing associated with the basic switch.2. Information resourcesthat are necessary for the provision

of special features.3. Service contreol facility that control the provision

ofspecial features and services- the basic network and the information resources are used to provide these services.

22

SWITCH SWITCH

Service Control Point

Service Management

System

TERMINAL

Intelligent Perpheral

DataBase

Interface A

Interface C

Interface B

Simple diagram of Intelligent Network

Manage services: billing,authorization,and monitoring

Handle data base interrogation and contol routing

Recordedannouncement facility

23

INTELLIGENT NETWORK SERVICES

The main focus of standardisation is definition of SIB ( Service Independent Building Blocks) as a functionality provided by Data Base, for examples :

• Announcement• Notification announcement complete• Collect user information• Charging information• Traffic measurement• Insert data, modify data• Time dependent/independent decision• Screening

24

Example of Intelligent Network Services :

• Free call (advance free phone call)

• Credit call (Credit card calling)

• Universal acess number (Unicall)

• Televoting (Vote call)

• VPN (Virtual Private Network)

• Premium rate

• UPT (universal Personal Telecommunication)

• Three way services

• Emergency Services

• Intelligent Access and Routing.

25

• Free call Caller special number eg. 0800

• Credit call (Credit card calling) The customer automaticall;y charge on bank or credit card account

• Universal acess number (Unicall) Aloows the subscriber with several terminating in any number of location to be reach with unique number.

• Televoting (Vote call) Voting via telephone call to deliver an opinion.

• VPN (Virtual Private Network) Assign circuit when calls are in progress,

Sharing transmission, 2Mbps switch, numberingplan for private network

• Premium rate Wide vrietyof informationcan get from numerous information provider

• UPT (universal Personal Telecommunication)

To give user ability to make and receive calls at any point on any number of fixed networks.

• Three way services Three party communication

• Emergency Services Incidental service call, may direct to hospital.

• Intelligent Access and Routing. Can choose routingaver available networks that make best to use as option.

26

ISDN Standard :

1. ITU-T2. ETSI ( European Telecommunication Standardization Institute) 3. IETF ( Internet Engineering Task Force )

IN Standard :Prepare by :1. ITU-T (CCITT) and 2. ETSI( European Telecommunication Standardization Institute)

27