Sony Ericsson Dialog 4223 - Manual (Page 110)

Accessories
BusinessPhone – Dialog 4223 Professional / Dialog 3213 110
Headset with Group Listening s
Press to toggle between headset with or without Group
Listening.
Headset to handsfree s
Press.
Headset
h
Press the Headset key (optional).
Handsfree to headset
Headset
h
Press the Headset key (optional).