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Do Not Disturb (DND) Description: Service that allows a callee to trigger a feature to ignore/reject/decline any incoming call. Usage: Allows the callee to set up a service so the phone doesn't interfere with the user by means such as muting the phone, forwarding to voice-mail etc. Issue: The service itself has different ways to deal with the user's requirement "Do not disturb". Some implementation simply mutes the phone and forward the call to voicemail, some returns a busy signal when DND is set etc. Due to the fact that implementation may have different interpretations of what "Do not disturb" is supposed to trigger, interoperability depends not only on how a service may be implemented but what feature service is supposed to be triggered as well. |