A list of participants appears on this page when an audio conference is in-progress. The list shows the phone number of each participant and their associated name (if available). The icon identifies the conference leader. From this page, you can set the Active Speaker feature to show the participant who is speaking. You can also set call feature options when you schedule a conference.
As the conference leader (or delegate), you can access these conference options from the Participants tab while the conference is in-progress:
The Participant tab view is refreshed automatically and will show participants as they join or leave the audio conference.