Dial-in connection is a standard connection type where the host and attendees call the nearest access number to hold a conference.
The contractor pays the conference fee and each attendee pays for the calling charges to the access point.
As no charge is incurred for domestic calls made through the KDDI Telephone Service  as well as au mobile phones via the KDDI Business Call Direct , it is recommended to use KDDI's services to take advantage of them.
"KDDI Telephone Service" refers to any of the following 4 services:
KDDI Hikari Direct
KDDI Hikari Direct over Powered Ethernet
KDDI METAL PLUS 
Only applicable to calls made via the KDDI Business Call Direct by connecting from an extension to the access point for the Audio Conference Service.
A separate subscription to the Business Call Flat Rates is needed for free calling.
Dial-out connection is a connection type used when the host calls up the attendees.
The calling charges to the access point are included in the conference fee, which is paid by the contractor. Therefore, attendees do not need to pay calling charges.
Charged-to-destination Number Connection
Charged-to-destination number connection is a connection type where the attendees call the nearest access number to participate in a conference. Unlike dial-in connection, the calling charges to the access point are included in the conference fee, which is paid by the contractor. Therefore, attendees do not need to pay calling charges. This connection type is ideal for cases where calling charges should not be paid by the attendee, such as for meetings with a client.
The host and attendees can easily access conference functions by performing dialing operations during a conference.
Functions authorized to host
Attendee site count check
Dial-out (call up)
Presentation & presentation cancel
Conference lock & lock cancel
Functions authorized to host and attendee
How to use the service
Host informs attendees of the following information (via e-mail, etc.):
Conference date and time
Relevant access numbers
Attendee pass code
Host: Dial access number #1
Attendee: Dial access number #2
Enter the pass code following the guidance
Host: Enter host pass code + #
Attendee: Enter attendee pass code + #
Conference starts when host and all attendees have entered