AASTRA 4220 Lite for BusinessPhone User Guide EN - Manual (Page 9)

9 BusinessPhone – Dialog 4220 Lite / Dialog 3210
Description
1 Message / Conference
a. To send and receive messages. See section “ Messages ” on
page 49.
b. To establish a telephone conference. See section “ During Calls ”
on page 27.
2 Programmable key / Headset key
a. Storing numbers and program functions.
b. The Headset function is only available with option unit
(DBY 410 02) installed. The Headset key is programmed by the
system administrator. See section “ Accessories ” on page 80.
3 Programmable keys
Storing numbers and program functions.
4 Inquiry
To make an inquiry to an internal or external party.
See section “ During Calls ” on page 27.
5 Line
Line key for in and outgoing calls.
6 Volume control
7 Mute
To switch the microphone on or off. See section “ During Calls ” on
page 27.
8 Loudspeaker on/off
To switch the loudspeaker on or off. See section “ During Calls ” on
page 27.
9 Clear
To disconnect calls.
10 Loudspeaker
11 Handset with hearing aid function
Please note: The handset may attract and retain small
metal objects in the earcap region.