Conference call is a process of connecting multiple peoples together for group discussion. This can be achieved through service provider or through your own PBX. NEC SV8300 has 16 sets of three party conference / four party conference for Dterm users. Also Sv8300 has built-in 32 party conference trunk circuit which can be configured as 8 party conference calls X 4 groups, 16 party conference calls X 2 groups, 32 party conference calls X 1 group.
Basically it requires license to activate and the licenses are for every 8 conference circuits. One license activates 8 party conference and for 32 party conference / meet-me conference we need 4 nos of license.Apart from meet-me built in conference, SV8300 has multimedia conference facility which requires hardware and license. This in-built circuit provides free conference call facility.