Hello
@mestopholis77 , SIP trunking is enabled by default , you can go the phone numbers tab and click on the + button and click connect via sip trunking and put your Termination URI from twilio , and for our URI you can put this on twilio -> sip:sip.retellai.com
You can also check this guide:
https://docs.retellai.com/deploy/twilio#twilio