This is the connector schema for the pre-F4 interphone made by several manufactures, by example Blueant, Cell Line, interphone.
All they have keyhole form.
|
Pin Number |
Pin Name |
Description |
| 1 | Chg+ | Charger +5V |
| 2 | Spk+ | Speaker + |
| 3 | NC | Not Connected |
| 4 | Spk- | Speaker - |
| 5 | Mic-/Chg- | Microphone - and Charger - |
| 6 | Mic+ | Microphone + |
The speaker is a 8 Ohms 3 Wats. the microphone is a little condenser microphone with a 0.1 pico farads and a diode soldered between the + and - terminals.


