| Pin | Pin Name | Description |
| 1 | CD | Carier detect. |
| 2 | Rx | Recieve data. |
| 3 | Ground | |
| 4 | Tx | Transmit data. |
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| Pin | Pin Name | Description |
| 1 | CD | Carier detect. |
| 2 | Rx | Recieve data. |
| 3 | Ground | |
| 4 | Tx | Transmit data. |