ATL Telecom AM64/512 User Manual
Page 31
2. X.21 byte tim ing ca ble - (15 way to 15 way D type plugs).
CCITT cir cuit
Tim ing Source (DCE)
Tim ing Sink (DTE)
CCITT cir cuit
T-A
2
4
R-A
T-B
9
11
R-B
R-A
4
2
T-A
R-B
11
9
T-B
B-A
14
1
SEXT-A
B-B
7
15
SEXT-B
I-A
5
3
C-A
I-B
12
10
C-B
C-A
3
5
I-A
C-B
10
12
I-B
GND
8
8
GND
3. V.24 / V.28 bit tim ing ca ble - ( 25 way to 25 way D type plugs).
CCITT cir cuit
Tim ing Source (DCE)
Tim ing Sink (DTE)
CCITT cir cuit
103
2
3
104
104
3
2
103
105
4
8
109
102
7
7
102
109
8
4
105
115
17
24
113
4. V.35 bit tim ing ca ble - (34 way to 34 way MRAC plugs).
CCITT cir cuit
Tim ing Source (DCE)
Tim ing Sink (DTE)
CCITT cir cuit
103-A
P
R
104-A
103-B
S
T
104-B
104-A
R
P
103-A
104-B
T
S
103-B
105
C
F
109
109
F
C
105
115-A
V
U
113-A
115-B
X
W
113-B
GND
B
B
GND
A-11
a
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