To answer a call:

1.When you receive an incoming call, your presence icon changes to onhook_ringing. The bottom of the plug-in also shows details of the caller and options for handling the call.
plug_in_incoming

To ignore the call, click on the plug_in_icon_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.

2.To answer an incoming call, click on the plug_in_icon_answer icon. The call details are now shown on the calls tab.
plug_in_incoming_call

3.The call controls shown vary to match the functions that you can use:

plug_in_icon_ignore End call
End the call. The caller is disconnected. For an ad-hoc conference that you started this ends the whole conference.

plug_in_icon_hold Hold
Put the call on hold.

plug_in_icon_mute Mute
Mute the call.

plug_in_icon_unmute Unmute
Unmute the call.

plug_in_icon_transfer Transfer
Transfer the call to another number.

plug_in_icon_consult Consult
Put the call on hold pending transfer whilst you make a consultation call to the transfer destination.

plug_in_icon_complete_transfer Complete Transfer
Finish a consultation call by transferring the held call.

plug_in_icon_conference_call Conference
Conference the current call and any held call.

plug_in_icon_record Record
Start recording the call.