Nullmodem (9-9)

From HwB

Use this cable between two DTE devices (for instance two computers).

Pinout

Dsub9f.png

9 PIN D-SUB FEMALE to Computer 1.

Dsub9f.png

9 PIN D-SUB FEMALE to Computer 2.

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

Note: DSR & CD are jumpered to fool the programs to think that they are online.

Contributions