Nokia 22 Operator's Manual page 33

Configuration
To change extension mode to the incoming call mode B, key in
9**Pre-Defined_Extension_Number#.
For further information about the application module functionality in different
outgoing and incoming modes, see " Functionality in trunk mode" on page 24
and " Functionality in extension mode" on page 25.
Restarting the terminal
To restart the Nokia 22, key in 555**#.
33
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