BT8375 CONEXANT [Conexant Systems, Inc], BT8375 Datasheet - Page 301

• Manufacturer Part Number: BT8375
• Description: single chip transceivers for T1/E1 and Integrated Service Digital Network (ISDN) primary rate interfaces
• Manufacturer: CONEXANT [Conexant Systems, Inc]

Bt8370/8375/8376
Fully Integrated T1/E1 Framer and Line Interface
Table A-2. T1DM Frame Format
N8370DSE
Note:
1. Y-bit is used to indicate a Yellow Alarm (active-low).
2. R-bit is used solely by AT&T as an 8 kbps communications channel to collect performance data on long haul DDS facilities.
Frame #
10
10
11
11
12
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
1150–1157
1343–1350
1536–1543
1729–1736
1922–1929
2115–2122
185–192
378–385
571–578
764–771
957–964
1158
1351
1544
1737
1930
2123
Bit #
193
386
579
772
965
0
A.2 T1DM Format
Framing Ft
Terminal
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
1
0
1
0
1
0
Conexant
Framing Fs
Signaling
F-Bits
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0
0
1
1
1
0
Sync Byte
10111YR0
10111YR0
10111YR0
10111YR0
10111YR0
10111YR0
10111YR0
10111YR0
10111YR0
10111YR0
10111YR0
—
—
—
—
—
—
—
—
—
—
—
—
Bit Use in Each Time
Info
1–7
1–7
1–7
1–7
1–7
1–7
1–7
1–7
1–7
1–7
1–7
1–7
—
—
—
—
—
—
—
—
—
—
—
A.2 T1DM Format
Slot
Appendix A
Ctrl
—
—
—
—
—
—
—
—
—
—
—
8
8
8
8
8
8
8
8
8
8
8
8
A-3