1 In Voice 2 In +5V=External Power, 0V=Battery 3 Out Ext Speak control 4 Analog GND 5 Out Voice 6 Out +5V=POWER ON, 0V=POWER OFF 7 Out Charger control 8 Digital/DC GND 9 In 0V=normal,+5V=test, +12V=test+flash 10 In Hook 11 In TTL serial in 12 Out TTL serial out 13 In 0V for aprox 1 sec = POWER ON/OFF 14 In DC Power supply