Aastra Telecom 41-001286-00 Manuel D’Utilisation

Aastra MBU 400 User Guide

The MBU 400 offers standard call handling features whether connected through a 
landline or a VoIP internet line. Intercom calls (between handsets on the same 
gateway) also have several call handling options.

You can place an active external call on hold if required. When a call is on hold, the 
“

Call held

” message displays at the top of the phone’s screen and the active call icon 

turns yellow as shown below. The caller on hold hears music playing until 
reconnected as an active call.

To place a call on hold do the following.

1.  During an active call, press the 

Hold

 softkey.

2.  Press the 

Back

 softkey or the red key 

 to return to the call.

You can make a call while a second call is on hold. When a call is on hold and you 
connect to a second call the active call icon is yellow and blue as shown below (or 
yellow only for intercom calls). The caller on hold hears music playing until 
reconnected as an active call.

To make a call while leaving a call on hold do the following.

1.  Place the active call on hold if you haven’t already done so (press the 

Hold

 

softkey).

2.  Enter a number or use the 

Options

 softkey to find an Intercom, Contact, or Call 

Log number.

3.  Press the green key 

 to complete the call.

VoIP call on hold

Landline call on hold

CLR

CLR

VoIP call with a call on hold

Landline call with a call on hold

Intercom call with a call on hold

R

R