| PC USB Pin | SIEMENS Pin | Description |
| 1 | 1 | USB Vbus |
| 2 | 4 | USB D- |
| 3 | 3 | USB D+ |
| 4 | 2,5,6,7 | GND |
Pins 2,5,6,7 of Siemens connector are wired together. USB VBus may be not connected - should work without this connection.
| PC USB Pin | SIEMENS Pin | Description |
| 1 | 1 | USB Vbus |
| 2 | 4 | USB D- |
| 3 | 3 | USB D+ |
| 4 | 2,5,6,7 | GND |
Pins 2,5,6,7 of Siemens connector are wired together. USB VBus may be not connected - should work without this connection.
