An Auto-Event Operator-Assisted call is exactly the same as an Event conference except that we provide unique MTP PIN codes in advance for invitees so that they can automatically be placed into conference when they dial in (no need to speak with an operator).  This format works well when invitees are registering in advance of the conference.  You simply give them the dialing instructions and PIN code. Registration and RSVP services are also available through MTP for a small fee.