Black Box LR5100A-T V.24 & RS232C Link Pinouts, DB25 Female DTE, Figure D-5 RS232 Link Pinouts

Interface Pinouts

V.24 & RS232C Link Pinouts

The connector shown here and pinouts described here correspond to the connector labeled “RS232 / V.24” on the back of the unit.

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DB25 Female DTE

			25	14
Contact	CCITT	Circuit	Circuit		Direction
Number	Circuit		Name		To	From
	Number				DCE	DCE
1	101	AA	Protective Ground		NA
2	103	BA	Transmitted Data		X
3	104	BB	Received Data			X
4	105	CA	Request to Send		X
5			----------
6	107	CC	Data Set Ready			X
7	102	AB	Signal Ground		NA
8	109	CF	Received Line Signal Detector (CD)			X
9			----------
10			----------
11			----------
12			----------
13			----------
14			----------
15	114	DB	Transmit Signal Element Timing (DCE			X
			Source)
16			----------
17	115	DD	Receive Signal Element Timing (DCE Source)			X
18	141		Local Loopback		X
19			----------
20	108.2	CD	Data Terminal Ready		X
21			----------
22	125	CE	Ring Indicator			X
23			----------
24	113	DA	Transmit Signal Element Timing (DTE Source)		X
25			----------

Figure D-5 RS232 Link Pinouts

The connecting cable must be a shielded cable.

NOTE For U.K. Approval:

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

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