Question : Plugging in a headset on a V-series panel automatically activates the HS-switch. Can you tell me whether this is detected on the Mic or the Headphone-pins of the headset-connector?
Answer : Headset detect uses the headphone impedance.
Minimum headphone impedance is 32R – Maximum impedance is 600R.
see also Matrix: Is it possible to disable the headset detect on the V-series panel