Last Modified 9th Feb 1999
| Pin Name | 9 Pin Connector Pin Number |
25 Pin Connector Pin Number |
| TX (Transmit) | 3 | 2 |
| RX (Receive) | 2 | 3 |
| RTS (Request To Send) | 7 | 4 |
| CTS (Clear To Send) | 8 | 5 |
| DTR (Data Terminal Ready) | 4 | 20 |
| DSR (Data Set Ready) | 6 | 6 |
| GND (Ground) | 5 | 7 |
| From | To |
| TX | RX |
| RX | TX |
| RTS | CTS |
| CTS | RTS |
| DTR | DSR |
| DSR | DTR |
| GND | GND |
| From DB25 Pin | To DB25 Pin |
| 1 | 1 |
| 2 | 15 |
| 3 | 13 |
| 4 | 12 |
| 5 | 10 |
| 6 | 11 |
| 10 | 5 |
| 11 | 6 |
| 12 | 4 |
| 13 | 3 |
| 14 | 14 |
| 15 | 2 |
| 16 | 16 |
| 17 | 17 |
| 25 (GND) | 25 (GND) |