ISDN Integrated Services Digital Network.

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Presentation transcript:

ISDN Integrated Services Digital Network

רשת טלפון ספרתי נתב ספרתי נתב ספרתי נתב ספרתי נתב ספרתי A/D A/D אס אס

רשת טלפון ISDN נתב ספרתי נתב ספרתי נתב ספרתי נתב ספרתי אס אס A/D A/D

עקרונות ה ISDN תמיכה בישומי קול ו data תמיכה ב circuit switch ו packet switch מספק רוחב פס של 2*64Kbs מספק רשת חכמה תוך התממשקות מלאה ל SS7 (stp , ssp)

תמיכה בישומי קול ו data ISDN FAX ALARM

Isdn central office

מספק רוחב פס של 64Kbs קו ISDN לבית (BRI) מוגדר כ 2B+D הכוונה היא ריבוב של 2 קווים מסוג B המוגדר כ 64Kbs ברמה הפיזית ללא הגדרת פרוטוקול קו D בקצב של 16Kbs לצורך ניהול ואיתות (מתאים ל SS7 )

BRI 2B + D = 144Kbs

רשת חכמה תומך ב Dfax – מעביר דף מלא של A4 בפחות 5 שניות (במקום 1 דקות) תומך ב העברת תמונות + videophone תומך ב teletext להעברת דפי מיידע (בדומה ל SMS בסלולאריים) התקנים מיוחדים המנצלים את הקישוריות ל ss7 כגון : בדיקת כרטיסי אשראי זיהוי מלא של המתקשר שיחות ועידה "עקוב אחרי" וכו'

ISDN – NT NT2 NT1

NT בזק A/D לבזק מחשב מודם מודם ISDN

ISDN Interfaces R Interface – between the existing equipment TE (Terminal Equipment) and TAs (Terminal Adaptor)allows the devices to communicate with an ISDN network S Interface – the universal interface between ISDN terminals or terminal adapters and the network channel termination unit (NT2) T Interface –between NT!And NT2.It accommodates link access and transport layers in the ISDN architecture U Interface –connection interface between NT1 and the network V Interface –between line termination (LT)and exchange termination (ET)

ISDN Interfaces

ISDN access configuration

ISDN access configuration

ISDN - Architecture

ISDN - Architecture

Address format

Physical layer

Physical layer

ISDN-frame format A יכול להפעיל ולכבות TE

U interface frames of 240 bits,at 160 kbps,repeated one frame every 1.5 ms

U interface

PRI-Primary Rate Interface

PRI-Primary Rate Interface

PRI-Primary Rate Interface The transmission structure of access links includes channels of: –B channel:64 kbps –D channel:16 or 64 kbps –H channel:384 (H 0 ),1536 (H 11 ),or 1920 (H 12 )kbps H channel –provides user information transmission at higher data rates –use the channel as a high-speed trunk or subdivide it based on TDM –examples:fast fax,video,high-speed data,high quality audio

PRI-Primary Rate Interface

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