Bandwidth/Connection quality test in the pre-join page

Hello. I noticed that in https://alpha.jitsi.net, there is a feature wherein the quality of the connection/bandwidth is tested and reported to the user in the pre-join page.

Selection_1312

OR

Selection_1310

How to enable this feature on a self-hosted jitsi using unstable?

Thanks in advance.

You need to enable callstats to be able to use that.

@damencho , thank you very much for the reply.