14Call FunctionsMaking a CallNote: You can make a call only when the network is available.At the dial keyboard, enter the phone number and then click the dial key. If dialing an extension, you may click thedial pad icon in the bottom of the screen to open the interface and enter the number of the extension. You mayalso press and hold the 0 key to add a (+) sign when adding an international dialing prefix.During a call, press the Volume Keys up / down to increase or decrease the volume.Call LogsDialkeyboardVolumelevel