RS232 to RS232. Cable wiring and pinout

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.