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T1 Overview
FT
100S
C-5
Figure C-2
Extended Superframe Format
The Facility Data Link (FDL) is also transmitted in the F bit position
and provides a separate low speed data channel on the T1 circuit which
does not interfere with the main data transmission. This out-of-band
data channel can be used for communicating general maintenance infor-
mation or for transmitting user defined information within the T1 link.
Two standard protocols for error maintenance data communication over
the FDL exist and are discussed below. The data rate for the FDL is 4
kbps.
The third function provided in the F bit position is the Framing Pattern
Sequence (FPS). The 2 kbps bit sequence defines frame and multiframe
boundaries and allows location of the CRC-6 and FDL bits by the
receiving equipment.
Extended Superframe
4632 bits
FR
1
FR
2
FR
3
FR
4
FR
5
FR
6
FR
7
FR
8
FR
9
FR
10
FR
11
FR
12
FR
16
FR
13
FR
14
FR
15
FR
17
FR
18
FR
19
FR
20
FR
21
FR
22
FR
23
FR
24
Frame
193 bits
CH
1
CH
2
CH
3
CH
4
CH
5
CH
6
CH
7
CH
8
CH
9
CH
10
CH
11
CH
12
CH
16
CH
13
CH
14
CH
15
CH
17
CH
18
CH
19
CH
20
CH
21
CH
22
CH
23
CH
24
M1
Frame
Overhead
1 bit
192 bits
Channel
8 bits
BIT 1 BIT 2 BIT 3 BIT 4
BIT 7
BIT 6
BIT 5
BIT 8
Содержание FT100 S
Страница 10: ...ESF Framing C 4 Framing Format Conversion C 6 Performance Monitoring C 6 Service and Support...
Страница 22: ...Installation 2 8 FT 100S...
Страница 28: ...Hardware Configuration 3 6 FT100S...
Страница 106: ...Control Port Operation 6 28 FT 100S...
Страница 108: ...Maintenance 7 2 FT 100S...
Страница 116: ...Specifications A 4 FT 100S...
Страница 120: ...Control Port Command Quick Reference B 4 FT 100S...
Страница 128: ...T1 Overview C 8 FT 100S...