Conferences can be launched immediately (ad hoc conferences)
Conferences can be planned up to 365 days in advance
Conferences can be set up in series
Moderator role with special rights: Participants can be added, removed, and put on mute during the conference via a web service
If the initiator of the conference cannot be reached, he can be called back a number of times.
No special knowledge of VoIP, PBX, ISDN, etc., required