The online Moderator Controls can be used from your browser when logged in to your account online.
In the 'Online Meeting Room' during a call, click on the 'Menu' and select 'Moderator Controls', to display the mute options available to you as Moderator during a call.
Conversation Mode: Default mode where all participants may speak, mute or unmute themselves by pressing *6.
Q&A Mode: All participants are muted and have the ability to unmute themselves individually.
Presentation Mode: All participants are muted and can only be unmuted by the moderator.
The default mute mode for all your calls can be set from within your account. Go to 'Settings' and then select 'Moderator Add-On' and click on your preferred default mute mode.