StarTech.com MATRIX SV3254DX4I - Manual (Page 68)

63
Serial Interface Pinout
RJ45 DB9 (male) Signal
1 6 DSR (input)
2 1 DCD (input)
3 4 DTR (output)
4 5 GND
5 2 RxD (input)
6 3 TxD (output)
7 8 CTS (input)
8 7 RTS (output)
N/A 9 RI (not used)
The DB9 side is wired as DCE (same as a computer). *