Siemens optiPoint 410 User Manual page 43

Operating the Telephone with the Display
Step by Step
> :
Select and confirm. The display shows "Transferring"
Join? >
and then "Calls joined". You can start a new call.
or Connect the two other parties by hanging up
Prerequisite: "Allow Join in conference" was activated
by the service personnel.
t
Replace the handset or press the loudspeaker key (in in
speakerphone mode). The display shows "Transferring"
and then "Calls joined". You can start a new call.
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