Good day! Please help me I can't set up the transfer_call tool in any way. The logs are redirected to a regular number, and the assistant's call is immediately reset. And the SIP number is not forwarded at all.

Add the transferCall tool to your assistant, ensure it triggers correctly, verify the call ends with assistant-forwarded-call, use valid SIP URIs with REFER enabled, and set phoneCallProviderBypassEnabled: false to enable successful call transfers..