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Scope of this CBT is to cover the following topics

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Scope of this CBT is to cover the following topics

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    1. Wednesday, August 22, 2012 1

    2. Wednesday, August 22, 2012 2 Scope of this CBT is to cover the following topics 1.Scenario before ISDN 2.Scenario after ISDN 3.What is ISDN? 4.Requirement for ISDN 5.Types of ISDN 6.ISDN Principles 7.Benefits of ISDN for 1.User or Customer 2.N/W operator or service provider 8.ISDN interfaces 9.UNI structure 10.Information carried in ISDN channels 11.UNI configuration 12.Types of ISDN connections 13.Types of ISDN services 14.ISDN address structure

    3. Wednesday, August 22, 2012 3 1.Scenario before ISDN Before ISDN, communication networks vary with the type of service, such as Telephone N/W, Telex N/W and Data N/W independently as follows:

    4. Wednesday, August 22, 2012 4 2.Scenario after ISDN After ISDN, a single network handle various types of services as follows:

    5. Wednesday, August 22, 2012 5 3.What is ISDN? In General: It is an integrated network for various types of communications services handling in digitized manner. As per CCITT: It is defined as A Network evolved from the telephony with integrated digital network(IDN) that provides end to end digital connectivity to support a wide variety of services , to which users have access by a limited set of standard multipurpose customer interfaces .

    6. Wednesday, August 22, 2012 6 4.Requirement for ISDN As per CCITT, if the network operator wants to introduce ISDN services, then he has to fulfill the following: 1.Network to Network connectivity should be Digital 2.No.7 signalling should exist between networks 3.Network synchronization

    7. Wednesday, August 22, 2012 7 5.Types of ISDN ISDN HAS 2 TYPES 1.NARROW BAND ISDN (N-ISDN) 2.BROAD BAND ISDN (B-ISDN) Quantity of information transported in terms of 64Kbps, then it is called N-ISDN. 2B+D 30B+D Quantity of information transported in more than 2Mbps, then it is called B-ISDN. Currently B-ISDN supports upto 2.5Gbps. Basic rate is 155Mbps. Possibility of defining higher rates in future.

    8. Wednesday, August 22, 2012 8 6.ISDN Principles Service integration

    9. Wednesday, August 22, 2012 9 7.Benefits of ISDN for User 1.Internationally standardized communications digital socket In conventional communications different communication sockets to be used But in ISDN, standardized communications digital socket is used for various communication services Also a terminal connected to a digital socket can be disconnected from the digital socket for reconnection to another digital socket at another location. This is called terminal portability digital socket will become indispensable for information input/output in human life

    10. Wednesday, August 22, 2012 10 7.Benefits of ISDN for User 2.Various communications functions One digital socket of ISDN enables very high speed, quality and capability through 3 or 30 channels The data communication speed on conventional circuits being 4.8 or 9.6 Kbps where as the communication speed on ISDN channel is 6 to 10 times faster High quality, stable communication Noises and bit error are hardly appear Network and eqpt failure are easily detected System recovery by switching to backup system is faster

    11. Wednesday, August 22, 2012 11 7.Benefits of ISDN for User 3.Cost effective communication measure Since ISDN provides higher capabilities and performance and it will satisfy future technological trends in telecom services, it will be more Cost effective communication measure

    12. Wednesday, August 22, 2012 12 7.Benefits of ISDN for User 4.Flexible function distributed to terminals and network In ISDN, simple digital pipes are supplied. This enables users of the communication network connect various devices to the ends of these pipes more flexibly than conventional network

    13. Wednesday, August 22, 2012 13 7.Benefits of ISDN for User 5.Future expansion The ISDN system is designed with considerations given to upward version compatibility and expandability in stages Because of layer structure used, new function can be added without changing the existing parts

    14. Wednesday, August 22, 2012 14 Benefits of ISDN for N/W operator 1.No separate network is required for different services As the voice and data services are integrated in ISDN, no separate network for different types of services required to meet the customer need 2.Usage of existing subscriber line The existing copper wire can be made use of for providing ISDN. Thus reducing the implementation time for ISDN basic services

    15. Wednesday, August 22, 2012 15 Benefits of ISDN for N/W operator 3.A single multi-purpose network A single network with uniform access technology for all types of services lead to cost effective and uniform operation and mtce

    16. Wednesday, August 22, 2012 16 8.ISDN interfaces As per CCITT, 3 types of interfaces are available in ISDN 1.Basic rate access (BRA) or Basic rate interface (BRI) 2B+D B-Basic channel or Bearer channel @ 64Kbps rate D-Data channel or Delta channel @ 16Kbps rate Useable for sub=2*64+16=144Kbps Additional 48kbps are used for synchronization, framing and overhead purposes Total=2*64 +16+48=192Kbps So data rate at basic rate interface is always 192Kbps

    17. Wednesday, August 22, 2012 17 8.ISDN interfaces 2.Primary rate access (PRA) or Primary rate interface (PRI) 30B+D B-Basic channel or Bearer channel @ 64Kbps rate D-Data channel or Delta channel @ 64Kbps rate Useable for sub=30*64+64=1984Kbps Additional 64kbps are used for synchronization, framing and overhead purposes Total=30*64 +64+64=2048Kbps or 2.048Mbps So data rate at primary rate interface is always 2048Kbps or 2.048Mbps

    18. Wednesday, August 22, 2012 18 8.ISDN interfaces 3.Higher rate interfaces H0 interface 384Kbps or 6B channels H1 interface H11 interface 1536Kbps or 24B channels or 4 H0 interface H12 interface 1920Kbps or 30B channels or 5 H0 interface The above interface is not used at present

    19. Wednesday, August 22, 2012 19 9.User network interface(UNI) structure

    20. Wednesday, August 22, 2012 20 10.Information carried in ISDN channels Three types of information are carried in the ISDN channels. They are: 1.user information This information is transferred between the user and the local ISDN node either on B or D channel. This information is important for user only and not for network. 2.control information This information is required by the ISDN or by the network or by the terminal for the purpose of establishing, releasing or modifying a connection through ISDN. This is always transferred on D channel

    21. Wednesday, August 22, 2012 21 10.Information carried in ISDN channels 3.Network information to subscriber This is used to inform the user about the situations occurring in the network This information is also transferred on D channel

    22. Wednesday, August 22, 2012 22 11.UNI configuration User network interface configuration is covered as follows: 1.ISDN subscriber system functional configuration 2.ISDN subscriber access configuration

    23. Wednesday, August 22, 2012 23 1.ISDN subscriber system functional configuration This is covered with the following equipments called customer premises equipments (CPE): 1.Network terminator-type 1 (NT1) 2.Network terminator-type 2 (NT2) 3.Terminal equipment type-1 (TE1) 4.Terminal equipment type-2 (TE2) 5.Terminal adapter (TA) More information of above items are available in CBT on CPE-FOR-ISDN SUB

    24. Wednesday, August 22, 2012 24 2.ISDN subscriber access configuration Basic access ISDN subscriber is accessing the network using various terminal equipments by means of: 1.point to point configuration 2.point to multipoint configuration 1.using short passive bus 2.using extended passive bus More information of above items are available in CBT on CPE-FOR-ISDN SUB

    25. Wednesday, August 22, 2012 25 12.Types of ISDN connections ISDN network can offer 3 types of connection: 1.circuit switched connection on traffic channel (B channel) 2.packet switched connection on traffic channel (B channel) 3.packet switched connection on control channel (D-channel)

    26. Wednesday, August 22, 2012 26 12.Types of ISDN services The types of ISDN services as per CCITT as follows:

    27. Wednesday, August 22, 2012 27 14.ISDN address structure As per CCITT, ISDN address or numbering structure is equal to 55 digits. Out of this first 15 digits are used for international numbering scheme. Next 40 digits are called sub address.This corresponds to an individual terminal at sub premises This 40 digits are transparent as for network is concerned At present 4 digits only used for sub address

    28. Wednesday, August 22, 2012 28 14.ISDN address structure

    29. Wednesday, August 22, 2012 29 Summery 1.Scenario before ISDN 2.Scenario after ISDN 3.What is ISDN? 4.Requirement for ISDN 5.Types of ISDN 6.ISDN Principles 7.Benefits of ISDN for 1.User or Customer 2.N/W operator or service provider 8.ISDN interfaces 9.UNI structure 10.Information carried in ISDN channels 11.UNI configuration 12.Types of ISDN connections 13.Types of ISDN services 14.ISDN address structure

    30. Wednesday, August 22, 2012 30

    31. Wednesday, August 22, 2012 31

    32. Wednesday, August 22, 2012 32 GOOD BYE

    33. Wednesday, August 22, 2012 33

    34. Wednesday, August 22, 2012 34

    35. Wednesday, August 22, 2012 35 Web site address PLEASE VISIT THE FOLLOWING WEB SITE Tamil Nadu Circle Intranet Services

    36. Wednesday, August 22, 2012 36

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