User guide
7BusinessPhone – Dialog 4220 Lite / Dialog 3210
Description
12nd
Key for access to secondary key functions.
2 Transfer / Diversion
a. Transfer an ongoing call. See section “During Calls” on page 28.
b. Activate/Deactivate diversion. See section “Call Forwarding” on
page 37.
3 Inquiry / Conference
a. To make an inquiry to an internal or external party.
b. To establish a telephone conference.
See section “During Calls” on page 28.
4 Line 2
Line key 2 for in and outgoing calls.
5 Line 1 / Save/Redial
a. Line key 1 for in and outgoing calls.
b. Save or redial an external number.
See section “Outgoing Calls” on page 17.
6Message / Info
a. To send and receive messages. See section “Messages” on
page 51.
b. To enter information. See section “Absence Information” on
page 44.
7 Programmable keys
Storing numbers and program functions.
8 Mute
To switch the microphone on or off. See sections “During Calls” on
page 28 and “Silent ringing” on page 15.
9 Loudspeaker on/off
To switch the loudspeaker on or off. See section “During Calls” on
page 28.
10 Volume control
To adjust the volume. See section “Settings” on page 82.
11 Clear
To disconnect calls.
12 Loudspeaker
13 Handset with hearing aid function
Please note: The handset may attract and retain small
metal objects in the earcap region.










