Serial Printer (9-25) Cable Pinout - AllPinouts
From AllPinouts
serial interface cable Use this cable between computer (DTE) and printer (DTE) devices.

9 pin D-SUB female connector to the computer

25 pin D-SUB female connector to the printer
| D-Sub 1 | D-Sub 2 | ||
|---|---|---|---|
| Receive Data | 3 | 3 | Transmit Data |
| Transmit Data | 2 | 2 | Receive Data |
| Clear To Send + Data Set Ready | 8 + 6 | 20 | Data Terminal Ready |
| Carrier Detect + Data Terminal Ready | 1 + 4 | ||
| Ground | 5 | 7 | Ground |