3.9.8. Starting, using and adding to chat during a conference call 
During a conference call, guest and non-guest participants can exchange messages,
links or attachments with each other.
Guest participants can use the conference chat only if a moderator adds them to
it.
Only moderators are allowed to start the chat during a conference call.
‣ Parent topic: Section 3.9. Chat
Child topics:
‣ Section 3.9.8.1. Starting the chat during a conference call
‣ Section 3.9.8.2. Using the chat during a conference call
‣ Section 3.9.8.3. Hiding the chat during a conference call
‣ Section 3.9.8.4. Adding a guest user to the conference chat
‣ Section 3.9.8.5. Viewing chat messages after a conference ends