Lift the handset or press the Headset or the Speaker button.
Dial the number.
Alternatively, you can dial the number and press the Call soft key or OK button.
Note:
To make international calls, long press 0 to enter the plus sign (+) and dial the number.
If your system administrator sets the Dial mode to automatic, the phone dials the number immediately after you enter the correct number of digits or after a timer has elapsed. If the administrator sets the Dial mode as manual, you can enter the required phone number to make a call but the phone initiates the call only after you lift the handset, or press the Headset or the Speaker button.