Bt8370/8375/8376
AppendixA
Fully Integrated T1/E1 Framer and Line Interface
A.6 IRSM CEPT Frame Format
Table A-8 defines the frame format time slot 16-bit allocations for ITU-T CEPT
and IRSM CEPT.
Table A-8. CEPT (ITU–T and IRSM) Frame Format Time Slot 16-Bit Allocations
SMF
Frame #
Time Slot 16 Bits 1 to 8 of Each Frame
1
2
3
4
5
6
7
8
0
1
0
0
0
0
X0
Y
X1
X2
A1
B1
C1
D1
A17
A18
A19
A20
A21
A22
A23
A24
A25
A26
A27
A28
A29
A30
A31
B17
B18
B19
B20
B21
B22
B23
B24
B25
B26
B27
B28
B29
B30
B31
C17
C18
C19
C20
C21
C22
C23
C24
C25
C26
C27
C28
C29
C30
C31
D17
D18
D19
D20
D21
D22
D23
D24
D25
D26
D27
D28
D29
D30
D31
I
2
A2
B2
C2
D2
3
A3
B3
C3
D3
4
A4
B4
C4
D4
5
A5
B5
C5
D5
6
A6
B6
C6
D6
7
A7
B7
C7
D7
8
A8
B8
C8
D8
9
A9
B9
C9
D9
II
10
11
12
13
14
15
A10
A11
A12
A13
A14
A15
B10
B11
B12
B13
B14
B15
C10
C11
C12
C13
C14
C15
D10
D11
D12
D13
D14
D15
Note:
1. SMF indicates the sub-multiframe.
2. Ai–Di are the per channel signaling bits.
3. X0–X2 are the X spare bits normally set to 1.
4. Y is the Remote Multiframe Yellow Alarm Indication bit. When Y is set to a 1, this indicates that the alarm is active.
5. The Multiframe Alignment Sequence (MAS) is defined as the time slot 16 word that contains the 0000XYXX sequence.
N8370DSE
Conexant
A-11
CONEXANT [ CONEXANT SYSTEMS, INC ]
