Freepbx VS mumble-web

One possibility is using https://www.freepbx.org/ with a compatible VOIP phone and subscription. It will run in a docker. Disclaimer: I've never used it.

sounds like you may need to set up some PBX, https://www.freepbx.org/

Try FreePBX. I never used it for this purpose but I think that it may work. https://www.freepbx.org/

FreePBX

If you need free, go with the free open source distributions like FreePBX, Issabel, or FusionPBX.

FreePBX - https://www.freepbx.org

Then you would need a pbx. Your voip server. Something like this: https://www.freepbx.org/

Cool project anyone reading this may be interested in:

https://github.com/Johni0702/mumble-web

I've never used it but it should make having a p2p conversation through Mumble as easy as pointing your browser to some URL. UX matters (Mumble clients, including mobile apps, are not very user friendly last time i checked: they require some level of skill to use them)

Unmaintained for the last 4 years, sadly.

Mumble isn't exactly P2P. It has a server (murmurd) that handles all the streams. I think it could work as SFU. And, actually, there is a web frontend: https://github.com/Johni0702/mumble-web

Your use of Opus and the option to run a SFU makes this a suitable replacement of Mumble for meetings, like in the Pirate Parties around the world. We are heavy users of Mumble.

Mumble-web

I would also recommend Matrix with the Element client, but if you'd prefer something else, there's mumble-web, a web client for Mumble. I tested it out a couple months ago, and it works pretty well, but it took forever to figure out how to set it up. Just another option in case you don't like the others.

Nice project. For server side mixing, how hard would be to integrate Jam with Mumble? There is a Github repository that does it: https://github.com/Johni0702/mumble-web