Collapse AllExpand All

14.5.3. Invocation and operation Previous topic Parent topic Child topic Next topic

  • Initiating precedence calls - dialing access code + number
    1. The access code for the precedence level and the dialed extension number appears as the user types them. While dialing no extra signalling will be done.
    2. In case of the DSN Hotline, the feature may be started in the following ways:
      • hook-off
      • press the speaker button
      • press a direct call button
      • press a line button on a keyset
      • press a digit button
  • Precedence call to an idle subscriber
    1. On the display of the originating user the text "PRECEDENCE CALL" appears, 4 seconds later the MLPP level in addition to the existing information (called number, name) will be displayed.
    2. The destination user hears precedence call ring tone and the display shows the MLPP level in addition to the existing information (calling number, name).
  • Preempting a call successfully
    1. After dialing the access code and the extension number the text "PRECEDENCE CALL" appears on the display of the originating user. It also hears precedence ringback tone.
    2. The text "PRECEDENCE CALL WAITING" appears on the display of the destination user.
    3. The destination user hears preemption notification tone. The original call of the destination user will be disconnected.
    4. The original partner of the destination user hears preemption notification tone. The call will be disconnected
    5. When the destination user goes on-hook, he will hear precedence call ringing immediately.
  • Unsuccessful precedence call attempt
    1. After dialing the access code and the extension number
    2. The originating user hears Blocked Precedence Announcement "(Switch name and location.) Equal or higher precedence calls have prevented completition of your call. Please hang up and try again. This is a recording. (Switch name and location)".
  • Initiating precedence call with unauthorized precedence level
    1. After dialing the access code the text "NOT AUTHORIZED" appears on the display of the originating user.
    2. the originating user hears Unauthorized Precedence level Announcement
      "(Switch name and location.)
      The precedence used is not authorized for your line.
      Please use an authorized precedence or ask you attendant for assistance.
      This is a recording.
      (Switch name and location)".
${DocTitle}, ID: ${DocID}
© 03/2026 Mitel Networks Corporation. All rights reserved. Mitel and the Mitel logo are trademark(s) of Mitel Networks Corporation. Unify and associated marks are trademarks of Unify Software and Solutions GmbH & Co. KG. All other trademarks herein are the property of their respective owners.