I'm trying to configure distinctive ring tones (so that I can separate internal from external calls). It appears from my reading like the group name should be displayed in the alert-info header ... and that I should be able to either edit the template or modify the phone settings (yealink) to ring distinctively based on that. However... when I set that up it doesn't work. I ran wire-shark and could not find any alert-info information at all. Anyone been able to make this work ???