I have a question for my kamailio configuration which works like this:

- INVITE arrives to kamailio

- HTTP async request to API endpoint

- Resume, use of rtjson module for parallel forking and loop to kamailio itself

- One of the invite is "transformed" in serial forking with rtjson module and it is sent with a delay to TWILIO SIP Domain (landline/mobile phone numbers) 

Twilio is giving me some troubles because it answers with a 200 OK but the call it is still in establishing/ringing on the "landline" side and as expected when reaching the timeout (no answer from phone number on TWILIO side) kamailio is receiving a BYE.

Now the question, how to handle next number to call through Twilio? 

I was thinking of using rtjson_next_route() when handling the in-dialog BYE but as it is not a failure route so it does not work, or I'm doing it wrong.

Thanks in advance for any help/hint.

Filippo