Getting to know your telephone 11Getting to know your telephoneSwitching the handset on/offLocking/unlocking the keypadThe keypad lock prevents any accidental use of the telephone.Lock/unlock the keypad: Press and holdControl keyIn the description below, the side of the control key (up, down, left, right) that you have to press in thedifferent operating situations is marked in black, for example for "press right on the control key" orfor "press the center of the control key".In idle statusIn submenus, selection and entry fieldsDuring a conversationVolume keysSet volume for receiver/headset, ringtone, handsfree mode and indicating appointments: Press the vol-ume keys / on the right side of the handsetDisplay keysThe display keys perform a range of functions depending on the operating situation.Display key icons p. 39Switch on: ¤ When the handset is switched off, press the End call key and holdSwitch off: ¤ When the telephone is in idle status, press the End call key and holdWhen a call is indicated on the handset, the keypad automatically unlocks and you can acceptthe call. It then locks again when the call is finished.It is not possible to call emergency numbers either when the keypad lock is activated.The control key enables you to navigate the menus and input fields and also to call upcertain functions depending on the situation.Open the directory Press brieflyOpen the main menu orOpen the system menuConfirm a functionOpen the directorySwitch the microphone off/onSelect the left display(only for HiPath Cordless Enterprise)Adjust the loudspeaker volume for receiver and handsfreemodeThe display keys have a function preset by default in idle status. Change the assignment:p. 32Current display keyfunctionsDisplay keysBack Save