|  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) |