Conference basics

Let's start simply. Add this snippet to dialplan:

After a comment, we create an extension that answers incoming calls to 3100-3199 (inclusive), then connect the caller to the conference named [destination_number]-[domain_name]. If the conference does not exist yet, it will be started using settings from profile "default". (For example, if you call extension 3110 on a server where the domain is 172.31.3.216, the conference name will be "3110-172.31.3.216". If the FreeSWITCH domain was set to biloxi.com, the conference name would be "3110-biloxi.com".)

The second extension is identical to the first one, but will answer calls to 31001-31011-31021... up to 31991 (for example, they're all ending with "1"), and the caller will be connected to a conference named in the same way as the first example (taking into account only the first four numbers in "expression"), and will be given a "moderator" role.

So, calling 3188 will connect you as a participant to the conference room named...