3.5.8. Initiating a Large Conference 
This is a type of conference that connects all the subscribers you are currently connected to on your terminal device:
Prerequisites
You have set up several simultaneous phone connections.
Step by Step
- Click on
in the call control bar of a phone
connection.You see a menu with connecting options. - Select Merge calls together.
All of your phone connections are combined to a conference.
‣ Parent topic: Section 3.5. Conferences