On 8/4/20 3:58 PM, Hendrik Boom wrote:
[...]> Normally, I use the Zoom app on my Android tablet, where I keep no
> critical information.

If video is not needed, then consider using Mumble [1]. It is
exceptionally easy to set up, both from the client perspective and the
user perspective. There are a lot of optional server-side configuration
extras to consider and those can take some reading [2] but it works out
of the box for the basics.

The sound quality is nice and the system requirements are quite low.
For privacy and availability, it is Free and Open Source Software and
uses open standards along with respectable encryption.

/Lars

[1] https://wiki.mumble.info/wiki/FAQ

[2] https://wiki.mumble.info/wiki/ACL_and_Groups#Examples