1. ISDN, CEENet Workshop '97, Zagreb, August '97 1 ISDN Ksenija Furman Jug ARNES ksenija.furman@arnes.si

2. ISDN, CEENet Workshop '97, Zagreb, August '97 2 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 '97 3 ISDN protocols E - series for Telephone network and ISDN I - series for ISDN concepts, aspects and interfaces

4. ISDN, CEENet Workshop '97, Zagreb, August '97 4 ISDN and OSI model Layer 1 - Physical (2B1Q) Layer 2 - Data Link (Q.920 - Q.923) Layer 3 - Network (Q.930 - Q.939)

5. ISDN, CEENet Workshop '97, Zagreb, August '97 5 Fundamentals 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: who is calling type of call calling what number

6. ISDN, CEENet Workshop '97, Zagreb, August '97 6 Fundamentals 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 '97 7 Advantages of ISDN Digital reliable connection Speed 128 kb/s (160 kb/s) for BRI 1920 kb/s (2048 kb/s) for PRI Fast call setup 2 seconds

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

9. ISDN, CEENet Workshop '97, Zagreb, August '97 9 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 '97 10 Interfaces and Devices Interfaces S/T (4w) U (2w) 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 '97 11 Using ISDN for IP Data Networks Characteristics Speed Fast call setup Bandwidth on Demand

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

13. ISDN, CEENet Workshop '97, Zagreb, August '97 13 ISDN Access Servers Digital modems (accepting analog and ISDN calls) software busy-out feature 56 kbit/s technologies Rate adaption (V.110, V.120,..) Compression (Stac,..) Synchronous PPP (with CHAP/PAP authentication)

14. ISDN, CEENet Workshop '97, Zagreb, August '97 14 ISDN Access Servers (2) PPP Multilink Controlling the number of B-channels per user D-channel based callback CLIP - Caller Line Identification Presentation

15. ISDN, CEENet Workshop '97, Zagreb, August '97 15 ISDN Adapters Internal/external Active/passive (for internal) Integrated NT Plug for telephone line Integrated modem Synchronous PPP (with CHAP/PAP authentication)

16. ISDN, CEENet Workshop '97, Zagreb, August '97 16 ISDN Adapters 2 PPP Multilink Rate adaption (V.110, V.120,..) CAPI Compression (Stac,…)

17. ISDN, CEENet Workshop '97, Zagreb, August '97 17 ISDN Routers Integrated NT Plug for telephone line Integrated modem Synchronous PPP (with CHAP/PAP authentication) PPP Multilink Compression (Stac,…) Tarrif management

18. ISDN, CEENet Workshop '97, Zagreb, August '97 18 Bandwidth on Demand Router to router connections ISDN call setup when leased line overloaded (i.e., ISDN is often used as a backup solution)

19. ISDN, CEENet Workshop '97, Zagreb, August '97 19 Backup lines Router to router connections ISDN call setup when leased line fails

20. ISDN, CEENet Workshop '97, Zagreb, August '97 20 Equipment ALL EQUIPMENT COMPATIBLE with existing national ISDN services Test new equipment first