11Using the phone1- Handset On/OffWhen the handset is placed on the charger it automatically switches ON.Otherwise press key until it switches ONTo turn the handset off, press key until 'Good Bye' appears. The LCDdisplay will then switch off .2- Key lockWhen this feature is turned on, all buttons except for ,will be locked and willnot function.Incoming or intercom calls can be answered by using any buttons on thetelephone. However, when you complete the call and hang up, the telephonereturns to lock mode.This feature is useful to avoid pressing buttons by mistake.Switch lock On: Press . until "locked" appears in the LCD displaySwitch lock Off: Press . until "locked" disappears from the LCD