Changing your dialing prefix on the DM100i-DM225

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Products affected: DM100®i, DM125™, DM200L™, DM225™
A dialing prefix, such as '9', may be required to connect to an outside line, depending on your phone system configuration. Follow these steps to change your dialing prefix:
  1. Press Options.
  2. Press Page Down twice.
  3. Select Connect-Data Center.
  4. Select Phone Parameters.
  5. Select Dialing Prefix.
  6. Type in the prefix number needed. Press the 1 key repeatedly to input special characters such as a # or *.
  7. Select Continue.
  8. Press Home to return to the home screen.

UPDATED: August 14, 2021