When request is sent from Kamailio to MS Teams SIP Proxy, the top R-R URI needs to contain FQDN of Kamailio SIP proxy instead of its IP address. Document
https://skalatan.de/de/blog/kamailio-sbc-teams suggest to replace record_route(); call with record_route_preset("SBC-DNS-DOMAIN:5061;transport=tls", "SBC-IP-ADDR:5060"); That works only in a very simple case where the request came in over UDP or TCP and SIP Proxy has only one listening address, i.e., SBC-IP-ADDR. One way to solve the problem might be a new r_r function that would take FQDN of the top R-R URI as argument or introduction of a pv from where the current record_route() function would take the FQDN if it has been set. Any comments or other solutions? -- Juha _______________________________________________ Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.org https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users