25 pin D-SUB male connector at the
computer.
| Pin | Name | Dir | Description |
|---|---|---|---|
| 1 | SNG | - | Shield ground |
| 2 | TXD | OUT | Tx Transmit Data, Out |
| 3 | RCD | IN | Rx Receive Data, In |
| 4 | RTS | OUT | Request to Send, Out |
| 5 | CTS | IN | Clear to Send, In |
| 6 | DSR | IN | Data Set Ready, In |
| 7 | GND | - | Ground |
| 8 | DCD | IN | Data Carrier Detect, In |
| 9 | n/c | No connection | |
| 10 | n/c | No connection | |
| 11 | n/c | No connection | |
| 12 | CH | IN | Data signal rate selector, In |
| 13 | n/c | No connection | |
| 14 | n/c | No connection | |
| 15 | n/c | No connection | |
| 16 | n/c | No connection | |
| 17 | n/c | No connection | |
| 18 | n/c | No connection | |
| 19 | n/c | No connection | |
| 20 | DTR | OUT | Terminal Ready Signal, Out |
| 21 | n/c | No connection | |
| 22 | CE | IN | Ring indicator, In |
| 23 | n/c | No connection | |
| 24 | n/c | No connection | |
| 25 | n/c | No connection |