[sr-dev] Kamailio functionality clarification - call forwarding no replay (call is ringing but not answered)

[Henning Westerholt]

Hello,

yesterday it was already answered from Alex that this is possible with Kamailio on the sr-users list. Please follow up there on this thread.
The development list is about development topics, usage questions and discussion should be done on sr-users.

Thanks and regards,

Henning

--
Henning Westerholt - https://skalatan.de/blog/
Kamailio services - https://gilawa.com<https://gilawa.com/>

From: sr-dev <sr-dev-bounces at lists.kamailio.org> On Behalf Of VESELOVSKY Pavel
Sent: Thursday, April 28, 2022 2:35 PM
To: sr-dev at lists.kamailio.org
Subject: [sr-dev] Kamailio functionality clarification - call forwarding no replay (call is ringing but not answered)

Hallo all,

I would need help with Kamailio. I hope, you can give me some hints.

I would like use Kamailio for CFNRy feature call forward no replay, i.e.

-          call is forked to multiple destination

-          180 is received, call is ringing, but not answered, no 200 OK is received from some destination

-          after predefined time (CFNRy timer), only this specific branch has to be rerouted to another destination


Expected behaviour is described in this flow:
[cid:image001.png at 01D85BA1.68083420]
My current behavior:

-          Kamailio TM module is involved for parallel forking (https://www.kamailio.org/docs/modules/stable/modules/tm.html#:~:text=1.-,Overview,-The%20TM%20module)

-          all branches are CANCEL-ed, it is not possible send CANCEL just to one specific branch
[cid:image002.png at 01D85BA1.68083420]

My questions:

-          is it possible to CANCEL just specific branch?

-          is it possible start timer just for specific branch?

-          do you think is it possible somehow implement this feature with Kamailio?

Thanks a lot in advance for any comment.
Pavel.



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