Hello,
Kamailio doesn't work like this way. In this occasion kamailio could work with upstream server as IP-Trust mode.
With Regards.Mojtaba

On Sun, Apr 7, 2019 at 12:42 PM Mostafa Moradi <moradi.victory@gmail.com> wrote:
Hi, I'm mostafa moradi from iran, I Have installed kamailio, and I have a sip trunk without username and password, I want to register the sip trunk in kamailio with UAC Module, but this module only accepts sip trunk with user and password, How Can I Register sip trunk in kamailio without
username and password?

Thank you in advance

Best regards,
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--
--Mojtaba Esfandiari.S