MiCollab for PC Client supports audio routing options (voice calls and voicemail messages) to seamlessly collaborate with other people.
Audio routing of voice calls
MiCollab Client routes the in-call audio to the default communication device. For example, a connected headset. If there is no default communication device available, the audio will be played through the default device. For example, built-in computer speaker.Note: The playback device type can be changed in the Windows, Sounds > Playback device settings.
You can choose whether the ringtone of an incoming call should be played through Default Device, Default Communication Device, or All Devices. From MiCollab for PC Client, click Settings > Call Settings > Playback Ringtone/Ringback. 
Set the Recording device as Default Communication Device in the Windows sound settings, to the required recording device.
If the headset or bluetooth speakerphone is selected as the default communication device for in-call and playback ringtone, all the audio is routed to the selected device. If the device is unplugged from the computer, all the audio is routed to the selected default device.
Audio routing of voicemail
You can change playback voicemail device type to specify the selected device. From MiCollab for PC Client, click Settings > Voicemail Settings > Playback Voicemail.