RS232 to RS232 connection between two computers or devices with RS232 ports. 25 pin

Use this cable between two DTE devices (for instance two PC or RS232 devices).

RS232 port pinout (D-SUB female) on Side 1 RS232 port pinout on Side 1
RS232 port pinout (D-SUB female) on Side 2 RS232 port pinout on Side 2

DB9-1 DB-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 show the rs232 software or rs232 devies that another side is online.

RS232 to RS232 related links

- If your devices have other connectors (for example, DB-25 pin) look here: RS-232 - RS-232 connection using DB25 connectors.
- Serial port - Serial port. Possible connections. DTE-DCE, DTE-DTE.
- RS232 port connector with all pins.