How to change the dialing prefix on the DM500, DM800i, DM900, DM1000 and more

Products affected: DM500™, DM525™, DM550™, DM575™, DM800™, DM800i™, DM825™, DM875™, DM900™, DM925™, DM1000™, and DM1100™
Some businesses require a dialing prefix, such as an 8 or a 9, to reach an outside line. Other businesses require a pound (#) sign or a star (*) in front of the dialing prefix.
To set the dialing prefix follow these directions:
  1. Press Menu.
  2. Select Set Up.
  3. Select Phone Set Up.
  4. Select Dialing Prefix.
  5. Use the numeric keypad to enter the number needed to dial to reach an outside line, for example, 9.
  6. Press Enter.
  7. Press the Left Arrow to return to the home screen.
If you require additional assistance, contact technical support. Please have your model and serial number ready.
UPDATED:  September 1, 2017