A:
This headset system supports Electronic Hook Switch for call control and ring detection. These features depend on your phone, some phones don't require any extra accessories for call control but most of them do.
We recommend that you visit our Compatibility Guide and search for your phone model to determine if there are any required accessories: http://www.plantronics.com/us/compatibility-guide/
Please don't hesitate to contact us at www.plantronics.com/support if you have additional questions regarding our products.