Siemens OpenStage 20 T - Enabling Room Listening During Calls

Basic functions
21
Step by Step
Making calls
Off-hook dialing
^ Lift the handset.
j Internal calls: Enter the station number.
External calls: Enter the external code and the station
number.
The called party does not answer or is busy:
\ Replace the handset.
On-hook dialing
j Internal calls: Enter the station number.
External calls: Enter the external code and the station
number.
The other party answers with speaker:
^ Lift the handset.
or On-hook dialing: Speakerphone mode.
The called party does not answer or is busy:
n Press the key shown. The LED goes out.