Aastra Telecom 41-001286-00 Manuel D’Utilisation

Aastra MBU 400 User Guide

All handset sounds can be reset to the default values in a single step, along with the 
display contrast and other customizable handset settings.

To reset all audio settings on your Aastra 420d handset to default values do the 
following.

1.  In Idle mode, press OK z to display the Main Menu.

2.  Select 

Settings

 

 

and press OK z.

3.  Select 

System settings

, and press OK z.

4.  Select 

Handset Settings

, and press OK z.

5.  Select 

Reset handset

, and press OK z.

6.  Confirm the reset by pressing the 

Yes

 softkey when prompted.

You can specify a ringer melody for each type of call that you receive, to easily 
distinguish between VoIP, landline, and intercom calls.

To change the ringer melody do the following.

1.  In Idle mode, press OK z to display the Main Menu.

2.  Select 

Settings

 

 

and press OK z.

3.  Select 

Audio settings

, and press OK z.

4.  Select 

Ringer Melody

, and press OK z.

5.  Select the type of call for which you want to specify a ringer melody, and press 

OK z. Valid selections are VoIP, Landline, and Intercom.

6.  Select a ringer melody from the list to assign to the selected type of call.

You can scroll through the list of melodies using the navigation keys and can hear a 
sample of the assigned melody by pressing the 

Play

 softkey. For available 

melodies, see the table below.

7.  Press OK z.

You can increase or decrease the ringer volume on a handset.

To change the ringer volume do the following.

1.  In Idle mode, press OK z to display the Main Menu.

2.  Select 

Settings

 

 

and press OK z.

Apache I

Classic twist

Apache II

Marimba

Apache III

NeoRetro

Classic

Rhythm chords

Classic rise