There's a four-ring 2.5mm stereo jack which provides connectivity to old-fashioned wired headsets.
The headsets used by Motorola smartphones (A780,A1200, ...) and the V-360 have a compatible configuration.
base = ground speaker left (internal impedance 33R) to ground. (+jackinsert detection) speaker right (internal impedance 33R) to ground. tip = mic electret condenser type, to ground. bias (power for mic) 2K2 from +3.3v(wolfson codec) (+HoldButton shortcircuit to ground)
Known working adapters
|TimoJyrinki||MP35A||pc-mobile.net||Koss KSC-35 headphones, Altec Lansing inMotion iM4 speakers and car audio via AUX - all work great.|
You probably want to fix mixer settings to overcome the poor low-frequency output, see Freerunner Hardware Issues for instructions.
To test Headset functionality
- Neo FreeRunner plus April Software Update
- FIC GTA02 battery
- SIM card
- Headset AP