AASTRA DT292 for BusinessPhone User Guide EN - Manual (Page 57)

57 BusinessPhone – Cordless phone DT292
Abbreviated Numbers
Cancel one specific individual abbreviated number #51*
Press
Z #
Enter an abbreviated number between 0 and 9 and press
Press
Wait for the call icon to stop flashing
Press to finish the procedure
Cancel all individual abbreviated numbers #51#
Press
Press
Verification tone.
Wait for the call icon to stop flashing
Press to finish the procedure