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ISDN = Integrated Services Digital Network Sentral Digital, Transmisi Digital, akses masih analog NISDN: Digitalisasi akses menjadi 64 kbps. NISDN (Narrow Band ISDN). Bandwidth - PowerPoint PPT Presentation
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NISDN (Narrow Band ISDN)
• ISDN = Integrated Services Digital Network
• Sentral Digital, Transmisi Digital, akses masih analog
• NISDN: Digitalisasi akses menjadi 64 kbps
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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)
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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
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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
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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
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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.
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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.
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LE
NT
ISDN TLP
NT
( 2B + D )
PABX
( 30B + D )
Primary Rate Access30B + D
Basic RateAccess
ISDN TLP
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Telecommunication Service
Basic TeleService
Barrier Service TeleService
Basic BarrierService
Basic TeleService +
Supplementary Services
Basic Barrier Service +SupplementaryServices
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NT PBX
PSTN
N-ISDN
PSPDN
30B+D2B+D
BRA PRA
Basic ISDN Concepts
TA
FAX
Passivebus
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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
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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
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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
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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
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ISDN Teleservice
• Telephony
• Teletext
• Telefax 4 (Fax Group 4)
• Mixed mode doc transfer
• Videotext
• Telex
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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
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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
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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
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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
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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
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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.
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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
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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
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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.
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• 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.
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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)
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