Hm, does someone know a #sip client that works from the #cli on #arm64 with 1und1.de #voip?

I tried

• linphonec, but didn't get it to register on my arm64 debian installation
• I like baresip, but I couldn't configure it to register to register with 1und1.de
• sipsimpleclient.org - worked somehow on my desktop, but didn't get it installed on arm64

It doesn't need to be fancy, I'm just looking for a simple tool to let a phone ring. No need to connect nor for audio transmission.