Ok. I think you misunderstand how TLS works. Every server is required to have a
certificate. If Zoiper doesn't have a certificate we can not set up a TLS connection
to the client. This is why we implemented SIP Outbound, which allows the client to set up
a TLS connection and keep it open, and allows the server to use that client-managed
connection to be used for outbound requests, like calls.
What you want to do is not technically possible. Contact the Zoiper team to please remind
them that Olle asked them to implement SIP outbound and you need it as well. Thank you!
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