 12 pin Siemens Slim Lumberg cellphone special connector at the mobile phone | | Mobile phone interface pin | Description | SX1 pinout |
| 1 | Vbatt? | Power Charging (Vbus in in x65, SX1) |
| 2 | Gnd | GND (usb GND in x65, SX1 USB cable) |
| 3 | Tx | TX (usb D+ in x65, SX1) |
| 4 | Rx | RX (usb D- in x65, SX1) |
| 5 | CTS | CTS, Data Line For Accesory |
| 6 | RTS | RTS, Data Line For Accesor |
| 7 | DCD | DCD, Clockline For Accesory |
| 8 | Audio P | AUDIO L |
| 9 | - | AUDIO GND |
| 10 | Audio N | AUDIO R |
| 11 | GND Mic | GND (EXT MIC.) |
| 12 | EPP | EPP 1 (EXT MIC.) |
Pins 5,6,7 should be shorted by 10KOhm resistors to pin 2 in x65, SX1 USB cable.
Source:www.pinouts.ru
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