VoIPstudio comes with five Virtual Conferene Rooms. Each user can dial #50N where N is a number of a conference room (from 1 to 5) to join the conference. For example to join Conference Room 1 please dial #501.
You can also assign Inbound Number(s) to your virtual Conference Rooms, so users of PSTN (traditional telephones) can dial into it. To edit a Conference Room settings: