26 Aastra MBU 400 User GuideUsing the 420d HandsetHandset Main MenuTo display the Main Menu on the handset, press the circular OK key z in the center ofthe navigation keys as shown below.Main MenuThe following icons appear on the Main Menu screen.The Handset Main Menu has five options to choose between when customizing andoperating the phone.Landline Allows you to place a call using the landline.See Landline Calls on page 43.DND Allows you to enable/disable Do Not Disturb on your phone.See Setting Do Not Disturb on page 37.Call Waiting Allows you to enable/disable Call Waiting on your phone.See Setting Call Waiting on page 37.Idle Mode Options (Continued)Navigation Keys OK Key(opens the Main Menu)ContactsContactsOK Key IndicatorIndicates that the OK key canbe used.SettingsCall LogMessages (voicemail)IntercomContactsMain Menu Icon DescriptionIntercom - Allows you use the Intercom to communicate between two handsetsregistered to the same MBU.For more information, see Intercom Calls on page 43.Messages - Allows you to access and play your voicemail messages. Your voicemailservice can be provided by your Service Provider or a local mail server. If using a ServiceProvider for voicemail, contact that provider for more information on how to use yourvoicemail service.For more information, see Voicemail on page 59.