Aastra Dialog 4220 Lite User Manual page 47

Make calls
Press and dial the number.
The headset key lamp is on.
Note: When the phone is set Headset preset, you can also
dial the number directly without pressing the headset key or
press a Line Key instead of the Headset key.
Press to terminate the call.
From headset to handset
Lift the handset
From handset to headset
Press
The headset key lamp is turned on.
Replace the handset
Headset with Group listening (loudspeaking)
Press to toggle between headset with or
without group listening.
When the Loudspeaker key lamp is on, the Group is
listening is active.
From headset to handsfree
Press
The loudspeaker key lamp is turned on
Press
Ericsson Dialog 4222
46