pef80913 Infineon Technologies Corporation, pef80913 Datasheet - Page 75
pef80913
Manufacturer Part Number
pef80913
Description
2b1q Second Gen. Modular Isdn Nt
Manufacturer
Infineon Technologies Corporation
Datasheet
1.PEF80913.pdf
(240 pages)
- Current page: 75 of 240
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•
•
Figure 33
Out of the 222 information bits 216 contain 2B + D data from 12 IOM
remaining 6 bits are used to transmit maintenance information. Thus 48 maintenance
bits are available per U-superframe. They are used to transmit two EOC-messages (24
bit), 12 Maintenance (overhead) bits and one checksum (12 bit).
•
Table 14
Super
Frame #
1
Data Sheet
<---1,5 ms--->
(I) SW
(Inverted) Synch Word
18 Bit (9 Quat)
Quat
Position
s
Bit
Position
s
Basic
Frame #
1
2
3
4
5
6
U-Basic Frame Structure
U-Superframe Format
Fram-
ing
1 – 9
1 – 18
Sync
Word
ISW
SW
SW
SW
SW
SW
2B +
2B +
D
2B +
D
2B +
D
2B +
D
2B +
D
2B +
D
10 –
117
19 –
234
2B +
D
D
12
User Data
216 Bits (108 Quat)
2B + D
Overhead Bits (M1 – M6)
118 s
235
M1
EOC
a1
EOC
dm
EOC
i3
EOC
i6
EOC
a1
EOC
dm
61
118 m 119 s
236
M2
EOC
a2
EOC
i1
EOC
i4
EOC
i7
EOC
a2
EOC
i1
EOC
a3
EOC
i2
EOC
i5
EOC
i8
EOC
a3
EOC
i2
237
M3
M1 – M6
Maintenance Data
6 Bits (3 Quat)
119 m
238
M4
ACT/
ACT
DEA /
PS1
SCO/
PS2
1/ NTM CRC3 CRC4
1/ CSO CRC5 CRC6
1
Functional Description
PEF 82912/82913
120 s
1
1
CRC1 CRC2
CRC7 CRC8
239
M5
®
-frames, the
2001-03-30
120 m
240
M6
1
FEBE
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