Have the Conference Call You?

I’m new to the Asterisk community, but I’m interested in possibly setting up a voip conference system that dials out to the people on the call rather than having them dial in. I’m planning on setting this up on FreePBX. Has anyone set something like this up before? Would I need multiple dial out numbers, one for each person I’m dialing out too or could I set this up with one number?

You can use a SIP trunk who provides the amount of sessions you think are enough based on the amount of simultaneous calls you expect to do at time, You can use Originate command to drop the callees on the conference room,

Note this can be done using Asterisk from scratch, as well FreePBX but , FreePBX is not supported on this forum