LiveKit Community

When using transfer_sip_participant, the user moves to other room with the transfer-target, but they still use the original Twilio trunk. Is it true?

Thanks for reaching out, Deepak. I'm an AI assistant and I'm here to help. Give me a moment while I research this topic.


Hey there! Just to clarify, when you use `transfer_sip_participant`, the user won’t stay connected to the original Twilio trunk once the transfer is done. Here’s what happens during the transfer:
• A SIP REFER is sent to move the active session to a new endpoint.
• The original session is ended with a BYE message.
• A fresh connection is made with the transfer target you specify in the `transfer_to` parameter.
So, after the transfer, the user won’t be connected to the original LiveKit room or Twilio trunk anymore. If you want the user to stay connected to your system while also connecting them to someone else, you’d want to try a different method—like adding another participant to the existing room. Hope that helps!
 Sources: <https://github.com/livekit/sip/blob/043b56bd1acc3509f48b474f5f676abb11d74873/test/integration/sip_test.go#L1-L82|test/integration/sip_test.go> | <https://docs.livekit.io/sip/transfer-cold|Transferring calls | LiveKit Docs> | <https://docs.livekit.io/agents/start/telephony/|Agents telephony integration | LiveKit Docs>