tfra08c13 ETC-unknow, tfra08c13 Datasheet - Page 40

• Manufacturer Part Number: tfra08c13
• Description: Tfra08c13 Octal T1/e1 Framer
• Manufacturer: ETC-unknow

TFRA08C13 OCTAL T1/E1 Framer
Frame Formats
Extended Superframe Format
The extended superframe format consists of 24 DS1 frames. The F bits are used for frame alignment, superframe
alignment, error checking, and facility data link transport. Table 13 shows the ESF frame format.
Table 13. Extended Superframe (ESF) Structure
1. Frame 1 is transmitted first.
2. The remote alarm is a repeated 1111111100000000 pattern in the DL when enabled.
3. Following ANSI T1.403, the bits are numbered 0—4361. Bit 0 is transmitted first. Bits in each DS0 time slot are numbered 1 through 8, and bit
4. The C
5. Signaling option none uses bit 8 for traffic data.
6. Frames 6, 12, 18, and 24 contain the robbed-bit signaling information in bit 8 of each voice channel, when enabled.
The ESF format allows for in-service error detection and diagnostics on T1 circuits. ESF format consist of 24 fram-
ing bits: 6 for framing synchronization (2 kbits/s); 6 for error detection (2 kbits/s); and 12 for in-service monitoring
and diagnostics (4 kbits/s).
40
Number
1 of each DS0 is transmitted first.
Frame
12
18
24
10
11
13
14
15
16
17
19
20
21
22
23
6
1
2
3
4
5
7
8
9
6
6
6
6
1
to C
1
6
Number
bits are the cyclic redundancy check-6 (CRC-6) checksum bits calculated over the previous extended superframe.
1158
1351
1544
1737
1930
2123
2316
2509
2702
2895
3088
3281
3474
3667
3860
4053
4246
4439
193
386
579
772
965
Bit
0
3
(continued)
Frame Bit
F
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0
0
1
0
1
1
E
D
—
—
—
—
—
—
—
—
—
—
—
—
D
D
D
D
D
D
D
D
D
D
D
D
L
CRC-6
C
C
C
C
C
C
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
1
2
3
4
5
6
4
Bit Use in Each Time
Traffic
1—8
1—8
1—8
1—8
1—8
1—7
1—8
1—8
1—8
1—8
1—8
1—7
1—8
1—8
1—8
1—8
1—8
1—7
1—8
1—8
1—8
1—8
1—8
1—7
Slot
Signaling None
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
8
8
8
8
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
5
2-State
Preliminary Data Sheet
Signaling Option
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
A
A
A
A
Lucent Technologies Inc.
Lucent Technologies Inc.
4-State
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
October 2000
A
B
A
B
2
16-State
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
C
D
A
B