Two-Wire Modem (9-25)

From HwB

This cable should be used for DTE to DCE (for instance computer to modem) connections without hardware handshaking.

Pinout

Dsub9f.png

9 PIN D-SUB FEMALE to the Computer

Dsub25m.png

25 PIN D-SUB MALE to the Modem

Female Male Dir
Shield Ground 1
Transmit Data 3 2 Arrowr.png
Receive Data 2 3 Arrowl.png
System Ground 5 7
Jumper these:
Request to Send 7 Arrowr.png
Clear to Send 8 Arrowl.png
Data Set Ready 6 Arrowl.png
Carrier Detect 1 Arrowl.png
Data Terminal Ready 4 Arrowr.png
Request to Send 4 Arrowr.png
Clear to Send 5 Arrowl.png
Data Set Ready 6 Arrowl.png
Carrier Detect 8 Arrowl.png
Data Terminal Ready 20 Arrowr.png

Contributions