You can invite Sembly to the scheduled meeting or add to the already ongoing call.
To automate the process, connect your Outlook or Google Calendar with Sembly and set up "All meetings in my calendar". To handpick what meetings Sembly should attend, select the option "Don't automatically attend" and switch on the "Attend" button available on a particular meeting from the Meeting List. "Only meetings I created" setting - Sembly joins only meetings where you are the organizer.
You have the option to invite Sembly to ongoing calls by clicking the +New Meeting in the upper-right corner and selecting Invite Sembly button in the drawdown. For more options please read our articles.