25Basic functionsAcknowledging an appointment/alarm clockYou are notified of an appointment or alarm clock by the specified ringer and the LED flashing redfor approx. 45 sec. The display shows the corresponding text. You can acknowledge the signallingwith Esc.Adjusting the volume of the earpiece during the callAastra 610dPress the +/- sidekeys to increase/lower the volume of the current call or use the (louder) and (quieter) navigation keys.Aastra 620d/630dPress the top or bottom sidekeys to increase or lower the volume of the current call or use the (louder) and (quieter) navigation keys.NoteIf you press the Ok softkey when adjusting the volume, the new value is saved (i.e. accepted as amenu entry).Switching the ringer on/offSwitch off: Press the star key and hold for a moment, the symbol appears on the display.Switch on: Press the star key again and hold for a moment, the symbol will switch off.Switching ringer off at callIf you want to switch off the ringer for a call that has just come in, press the C key. You can stillaccept the call as long as the caller has not hung up.24Basic functionsBasic functionsSwitching the handset on/offSwitching the handset offPress the End key and hold it down for a momentor …Press the End key briefly, select Switch off and press Ok.The handset will switch off after a confirmation prompt.Switching the handset onTo switch on press and hold the End key until the display lights again. This can take up to 10seconds.Key lock / Phone lockSwitching on the key lockPress the router key and hold for a moment. The key lock is activated and the symbol appe-ars in the display.Switching the key lock offPress the softkey with the symbol and then the router key within 3 seconds.Releasing the phone lockIf you have locked your telephone against unauthorised use (see page 57), you can release the lockagain by pressing the softkey and entering your PIN.Switching hands-free operation on/offPress the loudspeaker key to switch hands-free operation on or off.The symbol appears on the display if the hands-free operation feature is enabled.If you make a call using the handset and place it in the charger cradle, the hands-free operation fea-ture is automatically activated.VoIPon www.voipon.co.uk sales@voipon.co.uk Tel: +44 (0)1245 808195 Fax: +44 (0)1245 808299