455. Call features.5.1 Placing calls. You can use your handset to place an internal or external call. You can place a call usingthe following call modes:• Earpiece mode—pressing the off-hook key to dial out.• Speakerphone mode—pressing the speakerphone key to dial out.• Headset mode—connecting a headset.During the call, you can switch the call mode by pressing the corresponding keys orconnecting a headset.You can cancel the dialling operation by pressing the on-hook key. During the callconversation, you can press the left and right navigation keys to adjust the volume ofthe currently engaged audio devices (earpiece, headset or loudspeaker). The callduration is displayed on the LCD screen while the call is in progress.• Placing calls• Answering calls• Ending calls• Redialling calls• Call mute• Call hold/resume• Call waiting• Do not disturb (DND)• Call forward• Call transfer• Conference call• Anonymous call• Anonymous all rejection• VoicemailThis chapter provides operating instructions of the call features. Topics include:If you require additional information or assistance with your new phone, contact yoursystem administrator.Placing internal calls. You can make free internal calls between the handsets registered to the same basestation. You can place an internal call to one handset or all handsets registered to thesame base station.The W52P IP DECT phone is designed to be easily used like a regular phone on a publicswitched telephone network (PSTN). You can place internal and external calls, answercalls, transfer a call to someone else, or conduct a conference call.