Unify OpenScape Desk Phone CP400T - Speakerphone and Headset Call Handling; Answering Calls via Speakerphone; Answering Calls Using a Connected Headset

38 Basic functions
Answering a call via the loudspeaker
(speakerphone mode)
Suggestions for using speakerphone mode
• Tell the other party that you are using speakerphone mode.
• The speakerphone works bests at a low receiving volume.
• The ideal distance between the user and the telephone set in speakerphone
mode is about 50 cm (approx. 20 inches).
The phone is ringing. The caller appears on the screen.
: Press the key shown. The LED lights up.
or
Press the Softkey shown.
or
Z Confirm.
The speakerphone function is activated.
if nec." Set the call volume. Keep pressing the key until the desired volume is set.
Ending a call
: Press the key shown. The LED goes out.
Accepting a call via the headset
Prerequisite: A headset is connected.
The phone rings. The . key flashes.
. Press the key shown.
if nec. " Set the call volume.
Answer
Make sure your headset port is set up properly  page 35.