Press preload to preload the voip gadget. You will see actions appear that have been contributed declaratively by the voip gadget. Select a person object from the list and then select one of the actions. This will render the voip gadget and execute the selected action. Finally, you can close the gadget by pressing the 'x' icon and the action will be removed. You can also use the Sample Selection Listener gadget to view the contents of the currently selected object.