Palm Treo 680 pinouts
The connector/pinout information may be applied to the Palm (show all pinouts) model Treo 680

 Universal Cell Phone 3-pole (mono) headset connector pinout cordless/cell phones headset/handsfree cable connector
Universal Cell Phone 3-pole (mono) headset connector pinout cordless/cell phones headset/handsfree cable connector PalmOne Treo 650, 700, 755p and Centro headset / handsfree diagram pinout 4 conductor diagram
PalmOne Treo 650, 700, 755p and Centro headset / handsfree diagram pinout 4 conductor diagram MRLG 4-pole 2.5mm headset connector pinout MRLG pinout
MRLG 4-pole 2.5mm headset connector pinout MRLG pinout