Hello Maryam, generally speaking you can forward any incoming SIP request in Kamailio to an arbitrary location. This is usually done with the t_relay() function. It will route the request according the destination URI or request URI, you can also specify the destination directly in the t_relay(..) call. https://kamailio.org/docs/modules/5.2.x/modules/tm.html#tm.f.t_relay Cheers, Henning Am 28.09.19 um 11:48 schrieb Maryam Baghdadi: Hello everyone, Is it possible to relay INVITE request to another server after receiving "180 Ringing" response ??? I would like to activate CRBT(ring back tone) service and according to my research after receiving 180 ringing media playing request should be sent to a media server . _______________________________________________ Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.org<mailto:sr-users@lists.kamailio.org> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users -- Kamailio Merchandising - https://skalatan.de/merchandising/ Kamailio services - https://skalatan.de/services Henning Westerholt - https://skalatan.de/blog/