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(a)lists.kamailio.org> De la part de Daniel Tryba Envoyé : lundi 28 mai 2018 17:13 À : Kamailio (SER) - Users Mailing List <sr-users(a)lists.kamailio.org> Objet : Re: [SR-Users] Serial forking On Mon, May 28, 2018 at 04:55:30PM +0200, igor.potjevlesch(a)gmail.com wrote: 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_cont… 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(); } _______________________________________________ Kamailio (SER) - Users Mailing List sr-users(a)lists.kamailio.org https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users