Black Box LR5200A-R2 V.35 Link Pinouts, Figure D - 8 V.35 Link Pin Outs, Interface Pinouts, DB25

Interface Pinouts

V.35 Link Pinouts

The connector pinouts described here correspond to the connector labeled “V.35” on the back of the unit.

		13	1
		25	14
DB25	M.34			Direction
Contact	Contact		Circuit	To	From
Number	Number		Name	DCE	DCE
1	A		Protective Ground	NA
2			----------
3			----------
4	C		Request to Send	X
5			----------
6	E		Data Set Ready		X
7	B		Signal Ground	NA
8	F	Data Channel Received Line Signal Detector			X
9	P		Transmitted Data (A)	X
10	S		Transmitted Data (B)	X
11	R		Received Data (A)		X
12	T		Received Data (B)		X
13			----------
14	V	Receiver Signal Element Timing (A)			X
15			----------
16	X	Receiver Signal Element Timing (B)			X
17			----------
18	U	Transmitter Signal Element Timing (A) DTE		X
19	W	Transmitter Signal Element Timing (B) DTE		X
20	H		Data Terminal Ready	X
21			Local Loopback	X
22	J		Calling Indicator		X
23	Y	Transmitter Signal Element Timing (A)			X
24			----------
25	a	Transmitter Signal Element Timing (B)			X

Figure D - 8 V.35 Link Pin Outs

The connecting cable must be a shielded cable.

Circuits which are paired (contain an (A) and (B) reference) should be connected to twisted pairs within the connecting cable.

NOTE For U.K. Approval:

The connecting cable may be any length between 0 and 5M. One end must be terminated in a male 34 pin X.21 bis connector as defined in ISO-2593 1984. The other end must be terminated in a male 25 pin X.21 bis connector as defined in ISO-2110 1989

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