MBU 400 Hardware
The MBU 400 consists of an MBU and the Aastra 420d Handset. The following illustrations describe the ports, indicators, and keys on the MBU 400 hardware.
Aastra 420d Handset - Front View
COLOR DISPLAY
EARPIECE
OK KEY used to enter the main menu and select and confirm options
green key
used to make calls on primary line or answer calls
Navigational keys
used to navigate through menus and services
KEYPAD
used to enter numbers and letters
SOFTKEYS used for various functions
RED KEY
used to hang up
or leave a menu and to turn the handset on or off
MICROPHONE
STAR KEY
used in the name editor to capitalize letters, type num- bers, or enter a star symbol
Aastra 420d Handset - Front View
