DB9

1. DCD
2. RxD
3. TxD
4. DTR
5. GND
6. DSR
7. RTS
8. CTS
9. RI

RJ45

1. RTS
2. DTR
3. TxD
4. GND
5. GND
6. RxD
7. DSR/DCD
8. CTS

Hook DB9 2, 3, and 5 to RJ45 3, 6, and 4/5. Done.

Popularity: 69%