public void makeCall(String voipAddress) {
   // Set up an outgoing call instance.
   call = VoipManager.createVoipAudioMOCallInstance(voipAddress);
   call.setVoipAudioCallStateListener(this);
   boolean showCallerId =
       VoIPExample.getInstance().getSettingsManager().getSettings().isShowCallerId();
   call.startCall(showCallerId);
 }