AASTRA DT4x2 for BusinessPhone User Guide EN - Manual (Page 11)

11 BusinessPhone – Cordless DT412/DT422/DT432
Description
11 Alarm key (DT422 and DT432 only)
Sending alarms and testing the Alarm function. See section “ Alarm ”
on page 86.
12 Loudspeakers
One loudspeaker for ring signal and one for Loudspeaking. See
section “ Loudspeaking (Handsfree) ” on page 42.
Please note: The phone may retain small magnetic articles
around the earpiece region.
13 Charging connector
See section “ Installation ” on page 110.
14 Headset connector
See section “ Installation ” on page 110.
Note: Headset connector is optional.