Applicable to A/C/S/M/SL 2x, 3x, 4x, 5x, x25, x35, 3508, s2588? Full pinout.
|2||SELF-SERVICE||in/out||Recognition/control battery charger|
|4||BATTERY||out||Battery (S25 only)|
|5||DATA OUT (TX)||out||Data sent|
|6||DATA IN (RX)||in||Data received|
|7||Z_CLK||-||Clock line for accessory bus. Use as DCD In data operation|
|8||Z_DATA||-||Data line for accessory bus. Use as CTS in data operation|
|9||MICG||-||Ground for microphone|
|12||AUDG||-||Ground for external speaker|
Siemens sl42, sl45 and sl45i and some others should have audio L, R and Gnd somewhere in these 12 pins (for their stereo mp3 player). Suggested that audio L is pin 2, audio R is pin 11 and audio Gnd is pin 12.