Thank you. I'm running 4.2.7 but I think both options are available too.

I'm not sure to understand the first thing about t_set_fr. Currently, when I do lookup(aliases), the default behaviour is to send both calls simultaneously if there is 2 entries in aliases table. So, first, I'm wondering how can I change this behaviour to do serial forking instead.

-----Message d'origine----- De : sr-users sr-users-bounces@lists.kamailio.org De la part de Daniel Tryba Envoyé : lundi 28 mai 2018 17:13 À : Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.org Objet : Re: [SR-Users] Serial forking

On Mon, May 28, 2018 at 04:55:30PM +0200, igor.potjevlesch@gmail.com wrote:

I know that the default behaviour of two aliases in kamailio.aliases result in parallel forking.

I'm wondering if its possible to do serial forking instead? For example, in case that the first INVITE has no 180/183, or neither 100 Trying, then send the INVITE to the second entry?

Offcourse, fiddle with t_set_fr on a per call basis or the fr_inv_timer/fr_timer: http://www.kamailio.org/docs/modules/5.2.x/modules/tm.html#tm.f.t_set_fr

SERIALRELAY is used in stead of the normal RELAY route, it loads available endpoints with t_load_contacts: http://www.kamailio.org/docs/modules/5.2.x/modules/tm.html#tm.f.t_load_conta... and fetches the first one with t_next_contacts. In the failure route keep calling t_next_contacts till there are no more.

route[SERIALRELAY] { if (is_method("INVITE|SUBSCRIBE")) { t_on_branch("MANAGE_BRANCH"); t_on_reply("MANAGE_REPLY"); } if (is_method("INVITE")) { t_load_contacts(); t_next_contacts();

t_on_failure("SERIAL_FAILURE"); }

if (!t_relay()) { sl_reply_error(); }

break; }

failure_route[SERIAL_FAILURE] { if (!t_next_contacts()) { send_reply("408","Timeout or nobody available");

exit; }

t_on_branch("MANAGE_BRANCH"); t_on_reply("MANAGE_REPLY"); t_on_failure("SERIAL_FAILURE");

t_relay(); }

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