American Telecom AM64/128A manual Appendix a Interface Pin Connections

AM64/128A User Manual Appendix A - Interface Connections

APPENDIX A - Interface Pin Connections

25 Way D - type X.21 bis (V.24 / V.28*) Connector pin allocation

*V.28 defines the electrical characteristics of the circuits of a V.24 interface.

Note: Circuit 105 Request to send may have to be set in the Options Menu - see Appendix F (Troubleshooting).

Pin	Circuit	Description	TYPE
			SITS 89/43
7	102	Common Return	Common
2	103	Transmitted Data	Load
3	104	Received Data	Generator
4	105	Request to Send	Load
5	106	Ready for Sending	Generator
6	107	Data Set Ready	Generator
20	108.1	Connect Data Set to Line	Load
8	109	Data Channel Received Line Signal Detector	Generator
15	114	Transmitter Signal Element Timing (DCE)	Generator
17	115	Receiver Signal Element Timing (DCE)	Generator
21	140	Remote Loopback for Point-to-Point circuits	Load
18	141	Local Loopback	Load
25	142	Test Indicator	Generator
24	113	External Transmitter Signal Element Timing	Load

15 Way D-type X.21 (V.11) Connector pin allocation

	Pin				TYPE
A wire	B wire	Unbal	Circuit	Description	SITS 89/43
		8	G	Signal Ground / Common Return	Common
15	1		S EXT	External Signal element Timing	Generator
2	9		T	Transmit	Load
4	11		R	Received	Generator
3	10		C	Control	Load
5	12		I	Indication	Generator
6	13		S	Signal Element Timing	Generator
7	14		B	Byte Timing	Generator
7	14		F	Frame Start Identification	Generator

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