If you are referring to DTLS-SRTP, each SIP channel driver allows it to be configured. You’d need to be more specific about which one you are using, and what you have tried.
Hi! Thanks for your fast response!
Yes DTLS-SRTP. I just need to set the “Enable DTLS-SRTP” from advanced extension settings to yes.
By altering the sip table I could modify all the others necesary params, but not that one
Asterisk doesn’t provide a graphical interface, and there is no sip.endpoint.conf in the default installation. This looks like FreePBX, for which the peer support forum in https://community.freepbx.org/