3Com S21x installation manual 35/V.36 Cable, 35/V.36 DCE, Pin Function/Signal Name

V.35/V.36 Cable

V.35/V.36 Cable

V.35/V.36 DCE	The following table shows the DCE pinouts forV.35 and V.36 cables.
Cable Pinout
		Pin	Function/Signal Name
		1	SHIELD/FRAME GROUND
		2	TRANSMITTED DATA A
		3	RECEIVED DATA A
		4	REQUEST TO SEND
		5	CLEAR TO SEND
		6	DATA SET READY
		7	SIGNAL GROUND
		8	DATA CARRIER DETECT
		13	TRANSMIT CLOCK B
		14	TRANSMITTED DATA B
		15	TRANSMIT CLOCK A
		16	RECEIVED DATA B
		17	RECEIVE CLOCK A
		18	RECEIVE CLOCK B
		19	RECEIVE CLOCK B
		20	DATA TERMINAL READY
		21	TRANSMIT CLOCK B
		22	EXTERNAL TRANSMIT CLOCK B
		24	EXTERNAL TRANSMIT CLOCK A
		25	(No Connection)

B-8 PathBuilder S21x Switch Cabling