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ISDN, CEENet Workshop '97, Zagreb, August '971 ISDN Ksenija Furman Jug ARNES

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Presentation on theme: "ISDN, CEENet Workshop '97, Zagreb, August '971 ISDN Ksenija Furman Jug ARNES"— Presentation transcript:

1 ISDN, CEENet Workshop '97, Zagreb, August '971 ISDN Ksenija Furman Jug ARNES

2 ISDN, CEENet Workshop '97, Zagreb, August '972 Why ISDN? l ISDN - Integrated Services Digital Network l Telephone services -> Telecommunication services l Used for voice, image and data

3 ISDN, CEENet Workshop '97, Zagreb, August '973 ISDN protocols l E - series for Telephone network and ISDN l I - series for ISDN concepts, aspects and interfaces

4 ISDN, CEENet Workshop '97, Zagreb, August '974 ISDN and OSI model l Layer 1 - Physical (2B1Q) l Layer 2 - Data Link (Q Q.923) l Layer 3 - Network (Q Q.939)

5 ISDN, CEENet Workshop '97, Zagreb, August '975 Fundamentals l Types of channels –Bearer channel (B-channel=64 kb/s) clear pipe for data –Delta channel (D-channel, 16 kb/s or 64 kb/s) call signaling information: l who is calling l type of call l calling what number

6 ISDN, CEENet Workshop '97, Zagreb, August '976 Fundamentals l Service types –Basic Rate Interface (2 B channels + 1 D channel (16 kb/s)) –Primary Rate Interface (30 B channels + 1 D channel (64 kb/s))

7 ISDN, CEENet Workshop '97, Zagreb, August '977 Advantages of ISDN l Digital –reliable connection l Speed –128 kb/s (160 kb/s) for BRI –1920 kb/s (2048 kb/s) for PRI l Fast call setup –2 seconds

8 ISDN, CEENet Workshop '97, Zagreb, August '978 Advantages of ISDN (2) l Bandwidth on Demand –adding new channels to the bundle of channels l Multiple devices –phone, fax, PC, videoconferencing system, router, terminal adapter,.. each with its own subaddress

9 ISDN, CEENet Workshop '97, Zagreb, August '979 Interfaces and Devices TE1 TE2TA NT1 2W4W ISDN devices Analog devices: phone, Fax III,... Rate adaptation S/T interface U interface

10 ISDN, CEENet Workshop '97, Zagreb, August '9710 Interfaces and Devices l Interfaces –S/T (4w) –U (2w) l Devices –NT1 –TE1 - ISDN devices –TE2 - analog devices (need TA) –TA - Terminal Adapter (rate adaptation (V.110, V.120)

11 ISDN, CEENet Workshop '97, Zagreb, August '9711 Using ISDN for IP Data Networks l Characteristics –Speed –Fast call setup –Bandwidth on Demand

12 ISDN, CEENet Workshop '97, Zagreb, August '9712 Using ISDN for IP Data Networks l Modes of Usage –Dial Up (LAN or host) –Bandwidth on Demand –Backup lines –Permanent connections

13 ISDN, CEENet Workshop '97, Zagreb, August '9713 Dial Up l Providers need: –subscribe for PRI connections or multiple BRI connections –ISDN Access Server

14 ISDN, CEENet Workshop '97, Zagreb, August '9714 ISDN Access Servers l Digital modems (accepting analog and ISDN calls) –software busy-out feature l 56 kbit/s technologies l Rate adaption (V.110, V.120,..) l Compression (Stac,..) l Synchronous PPP (with CHAP/PAP authentication)

15 ISDN, CEENet Workshop '97, Zagreb, August '9715 ISDN Access Servers 2 l PPP Multilink l BACP l Controlling the number of B-channels per user l D-channel based callback l CLIP - Caller Line Identification Presentation

16 ISDN, CEENet Workshop '97, Zagreb, August ' k Technology Access server Modem Telephone switch Telephone switch Telephone switch ? Access server Modem Digital line Analog line <= 33,6 kbps <= 56 kbps ISDN, E1,.. <= 33,6 kbps

17 ISDN, CEENet Workshop '97, Zagreb, August ' k Prerequisites l Only one analogue/digital conversion –less noise and faster digital lines l Digital Access Server l Same technology in Access Server and in dial-up modem – K56Flex from Lucent Technologies and Rocwell – X2 from U.S. Robotics, Texas Instruments and Cirrus Logic

18 ISDN, CEENet Workshop '97, Zagreb, August ' k Considerations l 56 k not reached in reality –43 kbps practical maximum l Cost for upgrading equipment to ITU standard

19 ISDN, CEENet Workshop '97, Zagreb, August '9719 Dial Up l Users need for host connections: –subscribe for BRI connection –ISDN Adapter l Users need for LAN connections –subscribe for PRI or BRI connection –ISDN router (commercial, PC version with ISDN Adapter,..)

20 ISDN, CEENet Workshop '97, Zagreb, August '9720 Dial Up - Private PC with internal or external ISDN adapter Internet ISDN Access server ISDN connection Telephone Network

21 ISDN, CEENet Workshop '97, Zagreb, August '9721 Dial Up - LAN ISDN connection ISDN router Internet LAN ISDN Access Server Telephone Network

22 ISDN, CEENet Workshop '97, Zagreb, August '9722 ISDN Adapters l Internal/external l Active/passive (for internal) l Integrated NT l Plug for telephone line l Integrated modem l Synchronous PPP (with CHAP/PAP authentication)

23 ISDN, CEENet Workshop '97, Zagreb, August '9723 ISDN Adapters 2 l PPP Multilink l Rate adaption (V.110, V.120,..) l CAPI l Compression (Stac,…)

24 ISDN, CEENet Workshop '97, Zagreb, August '9724 ISDN Routers l Integrated NT l Plug for telephone line l Integrated modem l Synchronous PPP (with CHAP/PAP authentication) l PPP Multilink l Compression (Stac,…) l Tarrif management

25 ISDN, CEENet Workshop '97, Zagreb, August '9725 Bandwidth on Demand l Router to router connections l ISDN call setup when leased line overloaded

26 ISDN, CEENet Workshop '97, Zagreb, August '9726 Backup lines l Router to router connections l ISDN call setup when leased line fails

27 ISDN, CEENet Workshop '97, Zagreb, August '9727 Equipment l ALL EQUIPMENT COMPATIBLE with existing national ISDN services –Test new equipment first

28 ISDN, CEENet Workshop '97, Zagreb, August '9728 Ordering ISDN connections l With or without NT1 l Type of NT (NT1, NT1+2ab,…) l Types of B-channels (data, voice,both) l Usage od D-channel packet data l CLIP (Calling Line Identification Presentation) l Standard or comfort services

29 ISDN, CEENet Workshop '97, Zagreb, August '9729 National ISDN variations l USA: 5ESS/DMS100/NI-1/NI-2 l Europe: NET3 l France: VN2/VN3/NET33 l Germany: 1TR6/NET3 l Japan l Australia

30 ISDN, CEENet Workshop '97, Zagreb, August '9730 References - URL’s l l for RFCs: l l networking/isdn/info/isdn-guide l


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