MT9072 Zarlink Semiconductor, Inc., MT9072 Datasheet - Page 46

• Manufacturer Part Number: MT9072
• Description: Octal T1-E1-J1 Framer
• Manufacturer: Zarlink Semiconductor, Inc.

MT9072
4.1.2
For ESF links the 6 bit framing pattern 001011, inserted into every 4th S-bit position, is used to delineate both
frame and superframe boundaries. Frames #6, 12, 18 and 24 may contain the A, B, C and D signaling bits,
respectively. A 4 kHz data link is embedded in the S-bit position, interleaved between the framing pattern
sequence (FPS) and the transmit CRC-6 remainder (from the calculation done on the previous superframe).
See Table 9.
46
Frame #
T1 ESF Framing
10
11
12
13
14
Frame #
1
2
3
4
5
6
7
8
9
10
12
11
1
2
3
4
5
6
7
8
9
FPS
0
0
1
Table 9 - ESF Superframe Structure (T1)
Table 8 - D4 Superframe Structure (T1)
Ft
1
0
1
0
1
0
FDL
X
X
X
X
X
X
X
Fs
0
0
1
1
1
0
CRC
CB1
CB2
CB3
CB4
Advance Information
Signaling
A
B
Signaling
A
B