American Telecom AM64/128A - Manual (Page 51)

AM64/128A User Manual Appendix E - Private digital circuits
A-13
2. X.21 byte timing cable - (15 way to 15 way D type plugs).
3. V.24 / V.28 bit timing cable - (25 way to 25 way D type plugs).
4. V.35 bit timing cable - (34 way to 34 way MRAC plugs).
CCITT circuit
T-A
T-B
R-A
R-B
B-A
B-B
I-A
I-B
C-A
C-B
GND
CCITT circuit
R-A
R-B
T-A
T-B
SEXT-A
SEXT-B
C-A
C-B
I-A
I-B
GND
Timing Source (DCE)
2
9
4
11
14
7
5
12
3
10
8
Timing Sink (DTE)
4
11
2
9
1
15
3
10
5
12
8
CCITT circuit
103
104
105
102
109
115
CCITT circuit
104
103
109
102
105
113
Timing Source (DCE)
2
3
4
7
8
17
Timing Sink (DTE)
3
2
8
7
4
24
CCITT circuit
103-A
103-B
104-A
104-B
105
109
115-A
115-B
GND
CCITT circuit
104-A
104-B
103-A
103-B
109
105
113-A
113-B
GND
Timing Source (DCE)
P
S
R
T
C
F
V
X
B
Timing Sink (DTE)
R
T
P
S
F
C
U
W
B