[SR-Users] serial forking kamailio - twilio

[Alex Balashov]

I think what you’re asking is: if a call is answered and hung up, can Kamailio make another call to somewhere else? 

If so, the answer is no; proxies just can’t do that. Forking deals with the management early-stage requests during their pendency. Once a final dispositive reply for a request is received from the upstream UA, the transaction is finished. Kamailio cannot initiate new transactions in that sense. 

So, to roll over to another route after an answer+hangup, you’d need to implement this on the calling UA side.

Is that an accurate understanding of your question?

—
Sent from mobile, with due apologies for brevity and errors.

> On Jul 19, 2021, at 12:19 PM, Filippo Graziola <filippo.graziola at gmail.com> wrote:
> 
> 
> Hi all,
> 
> 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
> 
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