To answer a call:

1.When an incoming call arrives, the pop-up appears showing the call details.
toaster_incoming_call

2.Click on the toaster_icon_answer_call Accept call icon to answer the call.

To ignore the call, click on the plug_in_icon_ignore Ignore icon. For direct calls to you the call is redirected to voicemail if available, for hunt group calls it rings the next available member of the group.