3Com 32x manual Models 52x DTE mode, Models 52x DCE-like mode

Cabling the Connectors 1-9

Models 52x (DTE mode)

S/T	ISDN	B1 B2			SERIAL
	Line		Link		B	C
	Act			UNIVERSAL (B)	RS-232 (C)	Link
			Connect			Active
	Line
			Fault			Fault
	Error

RS-232 DCE cable

V.35 adapter

X.21 adapter RS-449/V.36 DCE

or RS-232 DCE cables

Models 52x (DCE-like mode)

S/T	ISDN	B1 B2			SERIAL
	Line		Link		B	C
	Act			UNIVERSAL (B)	RS-232 (C)	Link
			Connect			Active
	Line
			Fault			Fault
	Error

IBM cluster	RS-	232	direct
	connect		cable
controller

V.35 direct connect RS-449/V.36 direct connect

or RS-232 direct connect cables