3Com S27x, S26x, S24x installation manual V11 Signals Motherboard, Position Signal

The following table shows V.11 signals with V.11 DIMs on the motherboard.

V11 Signals (Motherboard)

Pin	DCE		V.11	Function/	Pin		DTE	Function/
	Position			Signal			Position	Signal
				Name				Name
1	---------------			SHIELD/	1	---------------		SHIELD/
				FRAME				FRAME
				GROUND				GROUND
2	<--------------		T (A)	TRANSMIT	2	-------------	>	TRANSMIT
				DATA A				DATA A
3	--------------	>	R (A)	RECEIVE	3	<--------------		RECEIVE
				DATA A				DATA A
4	<--------------		C (A)	CONTROL A	4	>---------------		CONTROL A
6	--------------	>	I (B)	INDICATION	6	<--------------		INDICATION
				B				B
7	---------------			SIGNAL	7	---------------		SIGNAL
				GROUND				GROUND
8	--------------	>	I (A)	INDICATION	8	<--------------		INDICATION
				A				A
14	<--------------		T (B)	TRANSMIT	14	--------------	>	TRANSMIT
				DATA B				DATA B
15	--------------	>	S (A)	SIGNAL	15	<--------------		SIGNAL
				TIMING (A)				TIMING (A)
16	--------------	>	R (B)	RECEIVE	16	<--------------		RECEIVE
				DATA B				DATA B
20	<--------------		C (B)	CONTROL B	20	--------------	>	CONTROL B
21	--------------	>	S (B)	SIGNAL	21	<--------------		SIGNAL
				TIMING (B)				TIMING (B)
22	<--------------		X (B)	EXTERNAL	22	--------------	>	EXTERNAL
				CLOCK B				CLOCK B
24	<--------------		X (A)	EXTERNAL	24	--------------	>	EXTERNAL
				CLOCK A				CLOCK A

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