串行直连电缆 25针-25针(NullModem)

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 25 针母插头：

引脚定义

　

D-Sub 1

D-Sub 2

　

Receive Data

3

2

Transmit Data

Transmit Data

2

3

Receive Data

Data Terminal Ready

20

6+8

Data Set Ready + Carrier Detect

System Ground

7

7

System Ground

Data Set Ready + Carrier Detect

6+8

20

Data Terminal Ready

Request to Send

4

5

Clear to Send

Clear to Send

5

4

Request to Send

---

本文关键字：电缆  各类接口资料，电子知识资料 - 各类接口资料