Prise DB9

Pin	Sig.	Desc.	Dir
1	DCD	Data Carrier Detect	⇐
2	RXD	Receive Data	⇐
3	TXD	Transmit Data	⇒
4	DTR	Data Terminal Ready	⇒
5	0V/COM	0V GND	=
6	DSR	Data Set Ready	⇐
7	RTS	Request To Send	⇒
8	CTS	Clear to Send	⇐
9	RI	Ring indicator	⇐