I need some help because I can’t configure my softphone. I use Zoiper. I receive this message : "
SIP 403 / Bearer capability not authorized
SIP 403 is shown when the server understands your request, but is refusing to fulfill it.
Contact your VoIP provider for assistance."
I use Asterisk on my own server. It runs on linux. I use softphone on Windows 2010 and Linux Ubuntu 20.04