串行直连电缆9针-9针(NullModem)引脚定义图

串行直连电缆9针-9针(NullModem)引脚定义图

串行直连电缆用于两台计算机的直接相连，电缆两端的插头都是 9 针母插头：

引脚定义

D-Sub 1

D-Sub 2

Receive Data

2

3

Transmit Data

Transmit Data

3

2

Receive Data

Data Terminal Ready

4

6+1

Data Set Ready + Carrier Detect

System Ground

5

5

System Ground

Data Set Ready + Carrier Detect

6+1

4

Data Terminal Ready

Request to Send

7

8

Clear to Send

Clear to Send

8

7

Request to Send