CX28394/28395/28398
AppendixA
Quad/x16/Octal—T1/E1/J1 Framers
A.2 T1DM Format
A.2 T1DM Format
Table A-2. T1DM Frame Format
Bit Use in Each Time
Slot
F-Bits
Frame #
Bit #
Terminal
Framing Ft
Signaling
Framing Fs
Sync Byte
Info
Ctrl
1
0
1
—
—
0
—
10111YR0
—
1–7
—
8
—
8
1
185–192
193
—
—
—
0
2
1–7
—
2
378–385
386
—
—
—
0
10111YR0
—
—
8
3
1–7
—
3
571–578
579
—
—
—
1
10111YR0
—
—
8
4
1–7
—
4
764–771
772
—
—
—
1
10111YR0
—
—
8
5
1–7
—
5
957–964
965
—
—
—
0
10111YR0
—
—
8
6
1–7
—
6
1150–1157
1158
—
—
—
1
10111YR0
—
—
8
7
1–7
—
7
1343–1350
1351
—
—
—
1
10111YR0
—
—
8
8
1–7
—
8
1536–1543
1544
—
—
—
1
10111YR0
—
—
8
9
9
1–7
—
1729–1736
1737
—
—
—
0
10111YR0
—
—
8
10
1–7
—
10
1922–1929
1930
—
—
—
0
10111YR0
—
—
8
11
1–7
—
11
2115–2122
2123
—
—
10111YR0
—
—
8
12
1–7
Note(s):
1. Y bit is used to indicate a Yellow Alarm (active low).
2. R bit is used solely by AT&T as an 8Kpbs communications channel to collect performance data on long haul DDS
facilities.
100054E
Conexant
A-3
CONEXANT [ CONEXANT SYSTEMS, INC ]
