| Láb név | Irány | Kivezetés száma | |
|---|---|---|---|
| 9 lábú | 25 lábú | ||
| CD (Carrier Detect) | In | 1 | 8 |
| RXD (Receive Data) | In | 2 | 3 |
| TXD (Transmit Data) | Out | 3 | 2 |
| DTR (Data Terminal Ready) | Out | 4 | 20 |
| GND | - | 5 | 7 |
| DSR (Data Set Ready) | In | 6 | 6 |
| RTS (Request to Send) | Out | 7 | 4 |
| CTS (Clear to Send) | In | 8 | 5 |
| RI (Ring Indicator) | In | 9 | 22 |