STU2071B1 데이터 시트보기 (PDF) - STMicroelectronics

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STU2071B1

4B3T U INTERFACE CIRCUIT

STMicroelectronics 

Figure 8: Burst Mode.

STU2071

LINE FRAME STRUCTURE.

The information flow across the subscriber line

uses the frame structure here below. The length

of one frame corresponds to 120 ternary symbols

being transmitted within 1 ms.

1

2

3

4

5

6

7

8

9

10 11 12

T1 T1 T1 T1 T1 T1 T1 T1 T1 T1 T1 T1

T1 T1 T1 T1 T1 T1 T1 T1 T1 T1 T1 T1 24

T1 T1 T1 T2 T2 T2 T2 T2 T2 T2 T2 T2 36

T2 T2 T2 T2 T2 T2 T2 T2 T2 T2 T2 T2 48

T2 T2 T2 T2 T2 T2 T3 T3 T3 T3 T3 T3 60 LT ⇒ NT

T3 T3 T3 T3 T3 T3 T3 T3 T3 T3 T3 T3 72

T3 T3 T3 T3 T3 T3 T3 T3 T3 T4 T4 T4 84

T4 T4 T4 T4 T4 T4 T4 T4 T4 T4 T4 T4 96

T4 T4 T4 T4 T4 T4 T4 T4 T4 T4 T4 T4 108

T4

SW1

120

1

2

3

4

5

6

7

8

9

19 11 12

T5 T5 T5 T5 T5 T5 T5 T5 T5 T5 T5 T5

T5 T5 T5 T5 T5 T5 T5 T5 T5 T5 T5 T5 24

M2 T5 T5 T5 T6 T6 T6 T6 T6 T6 T6 T6 36

T6 T6 T6 T6 T6 T6 T6 T6 T6 T6 T6 T6 48

T6

SW2

60 NT ⇒ LT

T6 T6 T6 T6 T6 T6 T7 T7 T7 T7 T7 T7 72

T7 T7 T7 T7 T7 T7 T7 T7 T7 T7 T7 T7 84

T7 T7 T7 T7 T7 T7 T7 T7 T7 T8 T8 T8 96

T8 T8 T8 T8 T8 T8 T8 T8 T8 T8 T8 T8 108

T8 T8 T8 T8 T8 T8 T8 T8 T8 T8 T8 T8 120

Agenda:

T1. . . . . .T8

M1, M2

SW1, SW2

B + B + D - Data (ternary)

Service Data (ternary)

Synchronizing Word

9/18

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