25 pin D-SUB male connector.
25 pin D-SUB female connector.
| Pin | Name | Description |
|---|---|---|
| 1 | GND | Ground |
| 2 | TxD- | Transmit Data line |
| 3 | RxD- | Receive Data line |
| 4 | n/c | Not connected |
| 5 | n/c | Not connected |
| 6 | HSK/DSR | TRxCB or CTSB |
| 7 | GND | Ground |
| 8 | n/c | Not connected |
| 9 | n/c | Not connected |
| 10 | n/c | Not connected |
| 11 | n/c | Not connected |
| 12 | n/c | Not connected |
| 13 | n/c | Not connected |
| 14 | n/c | Not connected |
| 15 | n/c | Not connected |
| 16 | n/c | Not connected |
| 17 | n/c | Not connected |
| 18 | n/c | Not connected |
| 19 | RxD+ | Receive Data line |
| 20 | TxD+/DTR | Connected to DTRB |
| 21 | n/c | Not connected |
| 22 | n/c | Not connected |
| 23 | n/c | Not connected |
| 24 | n/c | Not connected |
| 25 | n/c | Not connected |