Legend UC: How talk in a call and play ringtone at same time?

Hi,

  We are integrating the Voyager Legend UC to our communication software and noticed that (unlike for example the Blackwire C310) i cannot have the audio of a call and play the headset ringtone at the same time.

  In other words: calling IHostCommand::Ring(true) is not effective after having called IHostCommand::put_AudioState(AudioType_MonoOn).

  Is there, for Legend UC, a workaround for, while inside an active call, playing the headset ringtone, allowing the user to notice the incoming second call and then picking it up if he/she wills ?

  I am using Spokes 2.8.2 and my application is Windows / native C++ using COM.

Best Regards.