Hello, as I wrote on the issue tracker, the Route header is not present, now confirmed also by debug messages: Aug 11 00:06:11 c4-proxy-1 kamailio: 19(1925) DEBUG: {1 12375830 ACK 4a681d8626b801ce1a8185472fda8e86@48.146.161.153:5060} rr [loose.c:114]: find_first_route(): No Route headers found Aug 11 00:06:11 c4-proxy-1 kamailio: 19(1925) DEBUG: {1 12375830 ACK 4a681d8626b801ce1a8185472fda8e86@48.146.161.153:5060} rr [loose.c:961]: loose_route(): There is no Route HF Maybe the endpoint is losing the Route set by re-INVITE, which should not happen according to SIP RFC. But to see if that is the case, update your route[WITINDLG] and add record_route() there, like: route[WITHINDLG] { if (has_totag()) { record_route(); ... Cheers, Daniel On 11.08.20 11:24, Techinnovation wrote: |