Mitel 5000 Series:

  1. Press the blue Menu button
  2. Press Settings
  3. Press Programmable Keys
  4. Press the Key you wish to delete
  5. To delete the number press Clear Key
  6. Press Close until you are out of the menu system


Mitel 6940 IP:

  1. Press and hold the Speed Call for 4 seconds.
  2. Press the Delete softkey to remove the speed call number