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4 MBU 400 Installation Guide
Aastra 420d Handset Features
Display
128 x 128 pixels, 65K color support, backlight•
Graphical menu system•
Call and Telephony Features
12 numerical keys, 5 navigation keys, 2 function keys•
Auto answer (when handset is lifted from the charger)•
Key lock option•
Call forward - all, busy, no answer•
Call timer•
Call transfer and call hold (for internal calls)•
Call waiting indication•
Caller ID with name from phone book•
Distinctive ringing•
Call log of incoming/outgoing/missed calls•
Call return (from call log)•
Customizable phone settings•
Intercom (handset to handset through MBU)•
Contact List (up to 200 entries and up to 4 numbers per entry)•
Voicemail message support•
Speed dial support•
Three-way conferencing (2 handsets)•
Call hang up (upon return to charging cradle)•
On-hook dialing (pre-dial numbers before pressing off-hook •
button)
Audio Features
Mute (disable microphone)•
Receiver volume control•
Ring tone melodies•
Ringer volume control•
Key sounds (click, DTMF, and special tones)•
Low battery and out-of-range audible warnings•
Speakerphone•
Headset jack (2.5 mm)•
Other Handset Features
Separate charging station for handset•
Hearing aid compatible•
Multi-language support (Danish, German, English, Spanish, •
French, Italian, Dutch, Portuguese, Finnish)
Li-Ion battery pack•
Automatic or xed registration of handset to MBU•
Status indicators in idle mode (signal, battery level, date and •
time)
Message waiting indicator (missed calls, voicemail)•
Vibrator mode on handset•
MBU 400 Features