Hi Olle,

Thank you for your answer. Having a look at the dialog module documentation I think I can make use of parameters ka_timer + ka_interval together with dlg_set_property() function.

Do you know if I can manipulate the generated OPTIONS in any way? (like append_hf() ) Not able to test this at the moment but I assume it should work.


On Dec 28, 2015 11:07 AM, "Olle E. Johansson" <oej@edvina.net> wrote:

On 28 Dec 2015, at 09:51, Mititelu Stefan <fanx07@gmail.com> wrote:


What is the simplest way to configure Kamailio to generate periodical OPTIONS to the caller, for an established dialog?

Can you give me some starting references?

To be SIP correct, a proxy may not insert any transactions in a dialog between two endpoints. The endpoints have the cseq counter and inserting anything will mess with the CSEQ.

Having said that, the dialog module has a keep-alive function that does this. It may generate strange error messages which is fine. You want to test the behaviour on a per-device basis.


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