| Pin | Signal | Description |
| 1 | USBPowDet | USB Power Detection |
| 2 | Fbus Tx | tx using fbus protocol |
| 3 | Fbus Rx | rx using fbus protocol |
| 4 | Rx2 | |
| 5 | Vpp | |
| 6 | MBus | mbus protocol |
| 7 | Gnd | |
| A | Vbat+ | |
| B | BSI | |
| C | Gnd |
Physical connectors of Nokia E50 and Nokia 6233 are different.
Not sure about Nokia N91 (connector orientation may be wrong)


