RAD Data comm ASM-20 operation manual Signal

ASM-20Installation & Operation ManualAppendix D. DTE Interface Connectors

Table D-1 Interface Signal List (Female Connectors) Pins and Standard Signal Names (Cont.)

	RS-232	V.35			EIA-530		X.21
Signal	DB-25	DB-25	34-pin		DB-25		DB-25	DB-15		Description
Function	Stand-	Frame	Standalone		Standalone		Frame	Standalone
	alone				and Frame
	and							Pin Circuit/
	Frame		Pin Circuit		Pin Circuit			(Function)
External	24	19	U SCTE(A)	113	24	DA(A)	24	7	(A)	A serial data
Transmit		16	W SCTE(B) 113		11	DA(B)	11	14	(B)	rate clock input
Clock										from the data
										source. Positive
										clock
										transitions must
										correspond to
										data transitions.
Transmit	15	14	Y SCT(A) 114		15	DB(A)	15	6	S(A)	A transmit data
Clock		10	A SCT(B) 114		12	DB(B)	12	13	S(B)	rate clock for
									[SIGNAL	use by an
								TIMING]		external data
										source. Positive
										clock
										transitions
										correspond to
										data transitions.
Receive Clock	17	22	X SCR(B)	115	17	DD(A)				A receive data
		23	V SCR(A)	115	9	DD(B)				clock output
										for use by
										external data
										sink. Positive
										clock
										transitions
										correspond to
										data transitions.
Local Analog	18	18	L and j	141	18	LL				A control signal
Loop										input; when
										on, commands
										the ASM-20
										into Local
										Analog
										Loopback
										(V.54 Loop 3).
										See Table 2-2.
Remote	21	21	N and h	140	21	RL				A control signal
Loopback										input; when
										on, commands
										the ASM-20 to
										send a remote
										Loopback
										command
										(V.54 Loop 2)
										to the remote
										ASM-20. See
										Table 2-2.

13/4/99 16:40 General D-3