. . . . .
DT900/DT900S Series Phone User Guide B-177
For example, a user with the configured number of 1234 would dial #911234.
2 After the “Confirmation Tone” is given, end the call.
You should now be logged off to the terminal and the terminal should display the
default terminal name and number. All User Settings, Personal Directory/Speed Dial
key settings and Call History information should return to the values for the phoneset
terminal.