| Pin | Pin Name |
Description |
| 1 | CD | Carrier Detect |
| 2 | RXD | Recive data |
| 3 | TXD | Transmit data |
| 4 | DTR | Data terminal ready |
| 5 | GND | Ground |
| 6 | DSR | Data set ready |
| 7 | RTS | Request to send |
| 8 | CTS | Clear to send |
| 9 | RI | Ring indicator |
| 10 | NC | |
| 11 | Enable | connect to 12 for enable ser 2 |
| 12 | Enable | connect to 11 for enable ser 2 |

