American Telecom AM64/128A manual bis V.36 bit timing cable 37 way to 37 way D type plugs

Appendix E - Private digital circuits AM64/128A User Manual

5. X.21 bis V.36 bit timing cable - (37 way to 37 way D type plugs).

CCITT circuit	Timing Source (DCE)	Timing Sink (DTE)	CCITT circuit
103-A	4	6	104-A
103-B	22	24	104-B
104-A	6	4	103-A
104-B	24	22	103-B
105-A	7	13	109-A
105-B	25*	31*	109-B
109-A	13	7	105-A
109-B	31*	25*	105-B
115-A	8	17	113-A
115-B	26	35	113-B
102-A	19	19	102-A
102-B	20	20	102-B

*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).

CCITT circuit	Timing Source (DCE)	Timing Sink (DTE)	CCITT circuit
103-A	2	3	104-A
103-B	14	16	104-B
104-A	3	2	103-A
104-B	16	14	103-B
105-A	4	8	109-A
105-B	19*	10*	109-B
109-A	8	4	105-A
109-B	10*	19*	105-B
115-A	17	24	113-A
115-B	9	11	113-B
102	7	7	102

*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.

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