نام فایل : isdn99

فرمت : .ppt

تعداد صفحه/اسلاید : 30

حجم : 148 کیلوبایت

ISDN
Ksenija Furman Jug
ARNES
ksenija.furman@arnes.si
Why ISDN?
ISDN - Integrated Services Digital Network
Telephone services -> Telecommunication services
Used for voice, image and data
ISDN protocols
E - series for Telephone network and ISDN
I - series for ISDN concepts, aspects and interfaces
ISDN and OSI model
Layer 1 - Physical (2B1Q)
Layer 2 - Data Link (Q.920 - Q.923)
Layer 3 - Network (Q.930 - Q.939)
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
....