| Pin | Dir | Description |
|---|---|---|
| 1 | ![]() |
Voice |
| 2 | ![]() |
+5V=External Power, 0V=Battery |
| 3 | ![]() |
Ext Speak control |
| 4 | - | Analog GND |
| 5 | ![]() |
Voice |
| 6 | ![]() |
+5V=POWER ON, 0V=POWER OFF |
| 7 | ![]() |
Charger control |
| 8 | - | Digital/DC GND |
| 9 | ![]() |
0V=normal,+5V=test, +12V=test+flash |
| 10 | ![]() |
Hook |
| 11 | ![]() |
Rx (TTL serial in) |
| 12 | ![]() |
Tx (TTL serial out) |
| 13 | ![]() |
0V for aprox 1 sec = POWER ON/OFF |
| 14 | ![]() |
DC Power supply |
Direction is phone relative world.



