 9 pin D-SUB female connector at the computer | | DB9F | Signal | Cradle | Signal |
| 1 | CD | | |
| 2 | RXD | 6 | TXD |
| 3 | TXD | 8 | RXD |
| 4 | DTR | | |
| 5 | GND | 1 | GND |
| 6 | DSR | 10 | Gen.Purpose Output |
| 7 | RTS | 5 | CTS |
| 8 | CTS | 7 | RTS |
| 9 | RI | | |
| Shield | 10nF capacitor to ground | | |
| | | 4 | HotSync switch |
| | | 9 | HotSync switch live (to 3.3V via 330 ohms) |
| | | 3 | Gen.Purpose Input |
| | | 2 | NC |
|  10 pin PALM special connector at the PALM (keypad down) |