RJ45 to DB25 8 pin/4 wire Pin-out 	RJ45 to DB9 8 pin/4 wire Pin-out 

Software Flow Control (xon/xoff)	Software Flow Control (xon/xoff)
for Printers and Terminals (DTE)	for Printers and Terminals (DTE)

RJ45	Signal	DB25	Signal		RJ45	Signal	DB9	Signal
----	------	----	------		----	------	----	------
3	GND	Shell	GND		3	GND	Shell	GND
4	TxD	3	RxD		4	TxD	2	RxD
5	RxD	2	TxD		5	RxD	3	TxD
6	SG	7	SG		6	SG	5	SG

1*	DCD	4	RTS		1*	DCD	7	RTS

*	Some Operating Systems require carrier to be present.  In these
	cases altpin must be turned on and the DCD-RTS wire added.
	(In some cases it is possible to wire DCD-RTS instead of GND).




RJ45 to DB9 8 wire Pin-out		RJ45 to DB9 8 wire Pin-out 	

Hardware Flow Control (DTR)		Hardware Flow Control (RTS/CTS)
for Printers and Terminals (DTE)	for Modems (DCE)

RJ45	Signal	DB9	Signal		RJ45	Signal	DB9	Signal
----	------	----	------		----	------	----	------
3	GND	Shell	GND		1*	DCD	1	DCD
4	TxD	2	RxD		2	RTS	7	RTS
5	RxD	3	TxD		3	GND	Shell   GND
6	SG	5	SG		4	TxD	3	TxD
7	CTS	4	DTR		5	RxD	2	RxD
1*	DCD	7	RTS		6	SG	5	SG
2	RTS	8	CTS		7	CTS	8	CTS
8	DTR	6	DSR		8	DTR	4	DTR

		*Note:  Altpin needs to be turned on.

DB25 to DB9 8 wire Pin-out		DB25 to DB9 8 wire Pin-out 	

Hardware Flow Control (DTR)		Hardware Flow Control (RTS/CTS)
for Printers and Terminals (DTE)	for Modems (DCE)

DB25	Signal	DB9	Signal		DB25	Signal	DB9	Signal
----	------	----	------		----	------	----	------
Shell	GND	Shell	GND		8*	DCD	1	DCD
2	TxD	2	RxD		4	RTS	7	RTS
3	RxD	3	TxD		Shell	GND	Shell   GND
7	SG	5	SG		2	TxD	3	TxD
5	CTS	4	DTR		3	RxD	2	RxD
8*	DCD	7	RTS		7	SG	5	SG
&6      &DSR
4	RTS	8	CTS		5	CTS	8	CTS
20	DTR	6	DSR		20	DTR	4	DTR

		*Note:  Altpin needs to be turned off.