Adding or removing a dialling prefix on the DM50, DM55

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Products affected: DM50™, DM55™ (K724)

Enter a dialling prefix in your meter if you need to dial a number to reach an outside line. This will depend on your phone system configuration.

  1. Press Menu / Options.
  2. Press Review (down) to Change Setup?
  3. Press Enter/Yes.
  4. Press Review (down) to Change Communication Settings?
  5. Press Enter/Yes.
  6. Press Review (down) to scroll to Change Outside Line Number (Prefix)?
  7. Press Enter/Yes.
  8. Enter the dialling prefix then press Enter/Yes. A confirmation message appears.
  9. Press No when Stay in setup? appears to return to the Home screen.

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UPDATED: 22 April 2021