Siemens 300 H - Manual (Page 14)

Step by Step
Taking calls and setting up calls
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Open listening within the room during
a call
You can allow other persons in the room to listen in on
the call. Always inform the other party that you are
switching on the loudspeaker.
Precondition: You are making a call with the handset.
To activate:
Press the key. The lamp lights up.
To deactivate:
Press the key. The lamp goes out.
Switching to speakerphone
Precondition: You are making a call with the handset.
and
W
Hold the key down and replace the handset. Then re-
lease the key and continue the call.
Switching to the handset
Precondition: You are engaged in a call in the hands-
free conversing/open listening mode.
Q
Lift the handset. Continue the call.
Speaker
Speaker
Speaker