Download - ISDN, CEENet Workshop '97, Zagreb, August '97 1 ISDN Ksenija Furman Jug ARNES [email protected]
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ISDN, CEENet Workshop '97, Zagreb, August '97 2
Why ISDN?
ISDN - Integrated Services Digital Network Telephone services -> Telecommunication
services Used for voice, image and data
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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
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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)
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ISDN, CEENet Workshop '97, Zagreb, August '97 5
Fundamentals
Types of channelsBearer channel (B-channel=64 kb/s) clear
pipe for dataDelta channel (D-channel, 16 kb/s or 64
kb/s) call signaling information:who is calling type of callcalling what number
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ISDN, CEENet Workshop '97, Zagreb, August '97 6
Fundamentals
Service typesBasic Rate Interface (2 B channels + 1 D
channel (16 kb/s))Primary Rate Interface (30 B channels + 1 D
channel (64 kb/s))
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ISDN, CEENet Workshop '97, Zagreb, August '97 7
Advantages of ISDN
Digital reliable connection
Speed128 kb/s (160 kb/s) for BRI1920 kb/s (2048 kb/s) for PRI
Fast call setup2 seconds
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ISDN, CEENet Workshop '97, Zagreb, August '97 8
Advantages of ISDN (2)
Bandwidth on Demandadding new channels to the bundle of
channels Multiple devices
phone, fax, PC, videoconferencing system, router, terminal adapter,.. each with its own subaddress
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ISDN, CEENet Workshop '97, Zagreb, August '97 9
Interfaces and Devices
TE1
TE2 TA
NT12W4W
ISDN devices
Analog devices:phone, Fax III,...
Rate adaptation
S/T interface U interface
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ISDN, CEENet Workshop '97, Zagreb, August '97 10
Interfaces and Devices
InterfacesS/T (4w)U (2w)
DevicesNT1TE1 - ISDN devicesTE2 - analog devices (need TA)TA - Terminal Adapter (rate adaptation
(V.110, V.120)
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ISDN, CEENet Workshop '97, Zagreb, August '97 11
Using ISDN for IP Data Networks
CharacteristicsSpeedFast call setupBandwidth on Demand
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ISDN, CEENet Workshop '97, Zagreb, August '97 12
Using ISDN for IP Data Networks
Modes of UsageDial Up (LAN or host)Bandwidth on Demand Backup linesPermanent connections
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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 technologiesRate adaption (V.110, V.120,..)Compression (Stac,..)Synchronous PPP (with CHAP/PAP
authentication)
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ISDN, CEENet Workshop '97, Zagreb, August '97 14
ISDN Access Servers (2)
PPP MultilinkControlling the number of B-channels
per userD-channel based callbackCLIP - Caller Line Identification
Presentation
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ISDN, CEENet Workshop '97, Zagreb, August '97 15
ISDN Adapters
Internal/externalActive/passive (for internal)Integrated NTPlug for telephone lineIntegrated modemSynchronous PPP (with CHAP/PAP
authentication)
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ISDN Adapters 2
PPP MultilinkRate adaption (V.110, V.120,..)CAPICompression (Stac,…)
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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
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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)
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Backup lines
Router to router connectionsISDN call setup when leased line fails
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ISDN, CEENet Workshop '97, Zagreb, August '97 20
Equipment
ALL EQUIPMENT COMPATIBLE with existing national ISDN servicesTest new equipment first