FreePBX subscriber registration?

Question

Asterisk

There is a Debian8+Asterisk13+Free PBX12 server. The WEBRTC module is installed. And the question is, it is necessary that any user who registers on the site receives an internal number and, moreover, can get to the UCP (the same as the web softphone is located on the UCP). Although if there are somehow more wise decisions, tasks. I will be glad to listen to audio conferences between site users.