Using the MBU 400
Using the MBU 400
This section briefly describes how to use your MBU 400.
For more detailed information about using the features on your MBU 400, and to customize your Aastra 420d handset, see your MBU 400 User Guide. For information about configuring and upgrading your MBU 400, see your MBU 400 Administrator Guide.
Handset Idle Screen
After successful registration of the handset to the MBU, the idle screen displays. The following illustration describes the icons that appear on the idle screen.
Handset Name
Connection Status
Indicator*
Handset 1
01:55PM 
08/05/08
Call Log | Options |
Call Log 
for incoming, outgoing, and missed calls
(activated with softkey)
OK Key Indicator
indicates the OK key can be used
Battery Status
and charging indicator
Time and Date
Options
for redialing calls, viewing active calls, landline calls,
and for setting
DND and call waiting
*The following map key shows the various states for the connection status indicator.
Black Black - Indicates out of range of the MBU
White Black - Indicates within range of the MBU, but not ready for SIP calls
White White - Indicates within range of the MBU and ready for SIP calls on primary line