Unify OpenScape Desk Phone CP400T - Phone Controls and Operations; Softkey Functions and Usage

19 Getting to know your OpenScape Desk Phone CP400T
Keys and controls
Softkeys
Audio controls
Audio keys
Volume
Use the controls to adjust the properties of your phone, e.g. the volume.
Mode keys
You can switch to the relevant application using these keys.
Key Function when key is pressed
_
Activates the function of the left display option or opens another menu.
Key Function when key is pressed
:/É
Activate/deactivate the loudspeaker  page 39.
./Ê
Activate/deactivate the headset  page 38.
;/Æ
Activate/deactivate microphone (also for speakerphone mode)  page 42.
Key Function when key is pressed
@
Access Program/Service menu  page 23.
\
Call forwarding page 27.