Кабель нуль-модема RS-232C

GND ---
GND
5 SG ---
SG
 5
3 TxD ---
RxD
 2
2 RxD ---
TxD
 3
7 RTS ---
CTS
 8
8 CTS ---
RTS
 7
6 DSR ---
DTR
 4
4 DTR ---
DSR
 6