常见接口引脚定义汇总：网线、RS232、

1 网线RJ45

RJ45有两种绕线方式，T-568A和T-568B。
注意：绝大多数设备用的都是T-568B！！！请参照T-568B的线序！！！

1.1 Wiring

1.2 Pinout

2 RS232

2.1 DB9 Pinout & Wiring

Pin	SIG.	Signal Name	DTE (PC)
1	DCD	Data Carrier Detect	in
2	RXD	Receive Data	in
3	TXD	Transmit Data	out
4	DTR	Data Terminal Ready	out
5	GND	Signal Ground	-
6	DSR	Data Set Ready	in
7	RTS	Request to Send	out
8	CTS	Clear to Send	in
9	RI	Ring Indicator	in