Aastra Telecom 41-001286-00 Manuel D’Utilisation

Aastra MBU 400 User Guide

The MBU 400 System allows you to make both Internet and landline calls. Landline 
calls are calls made over the Public Service Telephone Network (PSTN) just like a 
regular phone. All outgoing calls (except emergency calls) are Internet calls by 
default, unless you specify otherwise. All emergency calls default to the landline. (If 
you don’t have a landline connected, you must change the emergency line setting. See 

 for details.)

The following sections describe how to make and answer Internet, landline, and 
intercom calls with the MBU 400 System.

To make internet calls on your Aastra MBU 400 phone, you must have registered an 
account on the MBU system through either the handset, Web UI, or configuration file. 
This may have been done for you by your System Administrator. If there are no VoIP 
accounts in the system, you will not be able to make internet calls, and attempts to do 

so will result in a red IP icon 

 on the handset display. For more information see 

Administrator Guide, or contact your system administrator.

When you make and receive Internet phone calls, the following icons display:

If your primary line is set as VoIP, do the following to make a VoIP call:

1.  In Idle mode, enter the number you want to dial.

2.  Press the green key 

.

If your primary line is set as Landline and you want to make a VoIP call, do the 
following:

1.  In Idle mode, enter the number you want to dial.

2.  Press the 

Options

 softkey.

3.  Select 

Call on VoIP

, and press OK z.

The phone dials the number as a VoIP call and displays the IP dialing icon.

Dialing or ringing

Active Call

Entering or editing a number

Incoming Call

R

R