When you’re on a phone call with someone in the Webex Calling app you can start a conference call to include others in the discussion so you don’t have to set up a meeting. Add up to 6 people into your call and do this by audio or video. Note: The Webex app is video capable and the call is added with video when you initiate the conference.
When you're on a phone call with someone, select More Options , and then choose Conference.
Enter the name, partial name, or phone number of the person you want to add to the call, select the person from the search results, and then select Call.
The first person is put on hold.
When the additional person answers the call, select Merge Call to combine the two calls into one.