Black Box LE3700A-R2 manual Appendix a RJ-45 Adapter Pinout

APPENDIX A: RJ-45 Adapter Pinout

	Table A-1.	RJ-45 Adapter Pinout.
Pin #	Signal Name	Pin #	DB25 to	DB25 to
(at EPS)	(at EPS)*	at adapter	terminal/	modem
			printer
8	CTS (in)	1	4	5
7	DSR (in)	2	20	6
6	Receive	3	2	3
5	Rx Return	4	7	7
4	Tx Return	5	7	7
3	Transmit	6	3	2
2	DTR (out)	7	6	20
1	RTS (out)	8	5	4

*This table assumes that you are using a swapped cable, in which pin 1 at one end goes to pin 8 at the other end. The diagram shows a terminal/printer (non-modem) example. You can use the inner 6 pins (2-7) with existing RJ-12 connectors, but they will not provide RTS/CTS flow control.

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