Hi, Can you tell me the differences between 'ad hoc multipoint conference' and 'multipoint conference'? According to the recommendation of H.323 V2, ad hoc multipoint conference : An Ad Hoc Multipoint conference was a point-to-point conference that had been expanded into a multipoint conference at some time during the call. multipoint conference : A Multipoint conference is a conference between three or more terminals. Any multipoint conference can begin with three or more terminals without expansion from point-to-point conference? Best wishes, soo Nada Research Co., Ltd. Korea.