The Grandstream Series DP7xx there are two different methods for using the Do Not Disturb (DND) functionality. If you find that you are not receiving incoming calls and notice a DND symbol on the phones screen, follow the instructions below to turn off DND

  1. Make sure the base and handset are running or higher.
  2. Preferences > Mute as DND = Enabled
  3. Call Features > Do Not Disturb = Disabled
  4. Press Mute button to enable and disable DND (top left red circle - DND = on)