bt8375kpf Conexant Systems, Inc., bt8375kpf Datasheet - Page 307

• Manufacturer Part Number: bt8375kpf
• Description: Single Chip Transceivers For T1/e1 And Integrated Service Digital Network Isdn Primary Rate Interfaces Systems
• Manufacturer: Conexant Systems, Inc.

Bt8370/8375/8376
Fully Integrated T1/E1 Framer and Line Interface
Table A-6. ITU–T CEPT Frame Format Time Slot 0-Bit Allocations
N8370DSE
Note:
1. SMF indicates the sub-multiframe. This partitioning is used in the CRC-4 calculation.
2. Si bits are International Spare Bits.
3. A bit is used to indicate a remote alarm condition (active-high).
4. SA4 to SA8 are spare bits that may be recommended by ITU–T for use in specific point-to-point applications (e.g., transcoder
5. SA4 to SA8 where these are not used should be set to 1 on links crossing an international border.
6. E bit is used to indicate a CRC-4 error. The normal state is both bits set to 1, when a CRC-4 error is detected one of the E bits
7. C1 to C4 bits are used to carry the CRC-4 code.
8. Time slot 0 that contains the 0011011 sequence is defined as the FAS word and Time Slot 0 that does not contain the FAS is
SMF
II
I
equipment conforming to Recommendation G.761).
is set to 0.
the Not-Word.
Frame #
10
11
12
13
14
15
0
1
2
3
4
5
6
7
8
9
C1/Si
C2/Si
C3/Si
C4/Si
C1/Si
C2/Si
C3/Si
C4/Si
0/Si
0/Si
1/Si
0/Si
1/Si
1/Si
E/Si
E/Si
1
Tables A-6
CEPT and IRSM CEPT, respectively.
2
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
and
A-7
3
A
A
A
A
A
A
A
A
0
0
0
0
0
0
0
0
Time Slot 0 Bits 1 to 8 of Each Frame
Conexant
define the frame format time slot 0-bit allocations for ITU-T
SA4
SA4
SA4
SA4
SA4
SA4
SA4
SA4
4
1
1
1
1
1
1
1
1
SA5
SA5
SA5
SA5
SA5
SA5
SA5
SA5
5
1
1
1
1
1
1
1
1
SA6
SA6
SA6
SA6
SA6
SA6
SA6
SA6
6
0
0
0
0
0
0
0
0
A.5 E1 Frame Format
SA7
SA7
SA7
SA7
SA7
SA7
SA7
SA7
7
1
1
1
1
1
1
1
1
Appendix A
SA8
SA8
SA8
SA8
SA8
SA8
SA8
SA8
8
1
1
1
1
1
1
1
1
A-9