American Telecom AM64/128A - Manual (Page 52)

Appendix E - Private digital circuits AM64/128A User Manual
A-14
5. X.21 bis V.36 bit timing cable - (37 way to 37 way D type plugs).
* In some cases it may be necessary to connect this line to GND (102) at the receiver end of the link
dependant upon the implementation of the interface control lines - balanced or unbalanced.
6. RS530 bit timing cable (25 way to 25 way D type plugs).
*In some cases it may be necessary to connect this line to GND (102) at the receiver end of the link
dependant upon the implementation of the interface control lines - balanced or unbalanced.
CCITT circuit
103-A
103-B
104-A
104-B
105-A
105-B
109-A
109-B
115-A
115-B
102-A
102-B
Timing Source (DCE)
4
22
6
24
7
25*
13
31*
8
26
19
20
Timing Sink (DTE)
6
24
4
22
13
31*
7
25*
17
35
19
20
CCITT circuit
104-A
104-B
103-A
103-B
109-A
109-B
105-A
105-B
113-A
113-B
102-A
102-B
CCITT circuit
103-A
103-B
104-A
104-B
105-A
105-B
109-A
109-B
115-A
115-B
102
CCITT circuit
104-A
104-B
103-A
103-B
109-A
109-B
105-A
105-B
113-A
113-B
102
Timing Source (DCE)
2
14
3
16
4
19*
8
10*
17
9
7
Timing Sink (DTE)
3
16
2
14
8
10*
4
19*
24
11
7