Volume adjustment for SIP Users

Hello everybody,

I am looking for a possibility to adjust the volume for SIP users logging in via Jigasi.
Connecting is fine (I just need the possibility to log into the conference from a phone line).

I didn’t find any configuration for this. Or is there another way to adjust the volume for the SIP users?

I don’t think of the volume slider inside the conference, that doesn’t do the trick.

I am connecting Jigasi directly to Sipgate basic. I actually only join the predefined room, but that is ok for now.

Regards Rainer