Siemens HIPATH 8000 - Manual (Page 20)

Step by step
Basic functions
20
Switching from headset to speaker-
phone mode
In standard mode
n
Press and hold the key (open listening ist activated),
o
Press the key shown. Speakerphone mode is activated.
In U.S. mode
n
Press the key shown.
o
Press the key shown. Speakerphone mode is activated.
Open listening
You can let other people in the room join in on the call.
Let the other party know that you have turned on the
loudspeaker.
Prerequisite: You are conducting a call via the handset.
Activating
n
Press the key shown.
Deactivating
n
Press the lit key.
Switching to speakerphone mode
n \
Hold down the lit key and replace the handset.