Aastra Dialog 4220 Lite User Manual page 5

12 Mute
a. To switch the microphone on or off during call. See
section "Mute" on page 19.
b. To switch off the ring signal in idle more or when
ringing. See sections "Mute ring signal" on page 43
and "Silent ringing" on page 44.
13 Volume control
To change the volume. See section "Settings" on page
38.
14 Loud Speaker
15 Handset
Supplied with hearing aid function as standard. An extra
handset can be connected, see section "Accessories" on
page 45.
16 Pull-out leaf for easy guide (optional)
17 Key panel (optional, Dialog 4222 Office Only)
With 17 programmable keys. One panel can be
connected. See section "Key panel (optional)" on page
45.
18 Designation Card
You system administrator can print new designation
cards for you.
Ericsson Dialog 4222
4