Audio call solution like Skype

I want to use RocketChat as an audio call solution like WhatsApp or Skype, for exemple when someone call me,the phone will continue to ring till I answer it.
But i have a problem with the integration of the WebRTC, when i activate the 3 options of the WebRTC module, I can’t make any call. There is not icone for making call.
But when i activate the jitsi videoconference, i have a phone icone and i can strat a videoconference.

How can we be able to strat a audio call with a stun serve for example?
If there is any other solution i’m open to hear about it.

Server Setup Information:

Version of Rocket.Chat Server: 3.2
Operating System: debian stresh
Deployment Method: docker
Number of Running Instances: 1
NodeJS Version: v12.16.1
MongoDB Version: 4.0.18

Thank you for your help.

You can use Jitsi and BigBlueButton as video conference system for Rocket Chat.

I thinks it’s not possible in Rocket Chat. Only Click to Join messages.