Aastra Telecom 41-001286-00 Manuel D’Utilisation

Aastra MBU 400 User Guide

 19

Each handset must be registered with your MBU 400 gateway before it can be used. If 
the handset is not registered, one of the following message appears on the handset 
displays:

Searching for Gateway

or

Please place handset in charger to start auto-registration with the gateway. 
Reset the gateway to enable registration mode.

To register your handset do the following.

1.  Ensure the base unit is connected to power.

2.  Place the handset in the charger.

3.  If the handset does not register automatically, press and release the 

 button 

on the side of the MBU 400.

Pressing 

 reboots the MBU, following which it remains in registration 

mode for 5 minutes. More than one handset can be registered in this period. To start 
a new 5 minute registration period, press and release the 

 button again.

Successful registration ends with the idle screen on the handset as shown in the 
section 

Handsets can be registered and de-registered through the handset menu options. See 

 for further information.

Remains lit when the MBU is connected to an Internet 
Telephony Service Provider.

Remains lit when a call is in progress (for both landline and 
Internet calls).
Flashes during firmware updates.

Press to reboot the unit, activate configuration changes, and 
enable handset registration mode.

Press and hold 15 seconds to reboot with factory default 
settings. All front panel lights come on when a factory restart is 
initiated.
NOTE: Configuration settings are lost during a factory default.

Indicates the power connection.

Indicates the Internet port.

Indicates the Telephone Line Connection port (PSTN).