pef82902 Infineon Technologies Corporation, pef82902 Datasheet - Page 73

• Manufacturer Part Number: pef82902
• Description: 4b3t Second Generation Modular Isdn Nt Intelligent Extended
• Manufacturer: Infineon Technologies Corporation

• 108 symbols: 144 bit scrambled and coded B1 + B2 + D data
• 11 symbols: Barker code for both symbol and frame synchronization (not scrambled)
• 1 symbol: Ternary maintenance symbol (not scrambled)
The 108 user data symbols are split into four equally structured groups. Each group
(27 ternary symbols, resp. 36 bits) contains the user data of two IOM
same order (8B + 8B + 2D + 8B + 8B + 2D).
Different syncwords are used for each direction:
• Downstream from LT to NT
• Upstream from NT to LT
On the NT side, the transmitted Barker code begins 60 symbols after the received Barker
code and vice versa.
Table 13
Data Sheet
1
13
25
37
49
61
73
85
97
109
D
D
D
D
D
D
D
D
D
M
1/2
7/8
1
2
3
4
5
6
8
2
14
26
38
50
62
74
86
98
110
D
D
D
D
D
D
D
D
D
+
1/2
1
2
3
4
5
6
7
8
Frame Structure A for Downstream Transmission LT to NT
3
15
27
39
51
63
75
87
99
111
D
D
D
D
D
D
D
D
D
+
1/2
1
2
3
4
5
6
7
8
4
16
28
40
52
64
76
88
100
112
D
D
D
D
D
D
D
D
D
+
3/4
1
2
3
4
5
6
7
8
5
17
29
41
53
65
77
89
101
113
D
D
D
D
D
D
D
D
D
–
3/4
1
2
3
4
5
6
7
8
+ + + – – – + – – + –
– + – – + – – – + + +
6
18
30
42
54
66
78
90
102
114
D
D
D
D
D
D
D
D
D
–
3/4
1
2
3
4
5
6
7
8
59
7
19
31
43
55
67
79
91
103
115
D
D
D
D
D
D
D
D
D
–
5/6
1
2
3
4
5
6
7
8
8
20
32
44
56
68
80
92
104
116
D
D
D
D
D
D
D
D
D
+
5/6
1
2
3
4
5
6
7
8
9
21
33
45
57
69
81
93
105
117
D
D
D
D
D
D
D
D
D
–
5/6
1
2
3
4
5
6
7
8
Functional Description
10
22
34
46
58
70
82
94
106
118
D
D
D
D
D
D
D
D
D
–
1
2
3
4
5
6
7
7
8
®
-2 frames in the
11
23
35
47
59
71
83
95
107
119
D
PEF 81902
D
D
D
D
D
D
D
D
+
7/8
1
2
3
4
5
6
7
8
2001-11-12
12
24
36
48
60
72
84
96
108
120
D
D
D
D
D
D
D
D
D
–
7/8
1
2
3
4
5
6
7
8