Hi, whenever I try to do a cold transfer using my outbound SIP trunk, I get a

500

error from the LiveKit API. When I try a fallback method of creating a new room and adding the caller to it, I get a

404

error that my trunk wasn’t found.

Hi! I’ve worked with SIP trunking and call flows on LiveKit and can help debug this. A 500 on cold transfer usually points to a trunk config or auth mismatch, while the 404 “trunk not found” often means the trunk SID/ID isn’t registered in the project or is being called from the wrong environment (prod vs dev). I can review your trunk setup, transfer logic, and API calls to pinpoint the issue and implement a reliable transfer/fallback flow. @hallowed-ocean-30053